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QUESTION ID:1

A chess board contains 64 squares of 5 cm size, in 8 rows and 8 columns, alternately black and white. What is the total length of edges (in m) between the squares in the chessboard?

QUESTION ID:2

Two rings made of metals A and B with ring A having a larger diameter, are placed concentrically leaving an annular gap. The thermal expansion coefficients of the two metals are CA and CB . Identify the correct statement(s) from the following.
A. The gap will decrease if CA < CB .
B. The gap will remain the same if CA = CB .
C. The gap will increase if CA < CB.

QUESTION ID:3

A car is moving along a bend in a road. The bend forms a large quarter circle. If the distance between the left and right wheels of the car is 2 m, then the difference between the distances travelled by the inner wheels and the outer wheels (in m) as it traverses the bend is

QUESTION ID:4

Human females have two X chromosomes, each of which can be passed on to their son or daughter with equal probability. Human males have one X chromosome which is passed on to their daughters and one Y chromosome which is passed on to their sons. Assuming equal numbers of males and females in a population, if an X chromosome is randomly sampled from the population, what is the probability that it was inherited from a female of the previous generation?

QUESTION ID:5

The graph shows the distribution of lifespan (in years) for individuals from species 1 and species 2.
Ifμ and σ represent mean and standard deviation of the lifespan, respectively, then, which of the following statements is true?

QUESTION ID:6

The following graph shows the mortality risk of a disease with respect to parameters A and B.
Which of the following combinations of parameters is associated with the lowest mortality risk?

QUESTION ID:7

How many integers can divide 1184 leaving a remainder of 29?

QUESTION ID:8

The speed of a car travelling with variable acceleration along a straight line is shown in the figure.
If a1 , a2 , a3 are the accelerations at times t1 , t2 , t3 , respectively, then

QUESTION ID:9

The cost of 2 mangoes, 1 coconut and 2 bananas is Rs 71, while the cost of 5 mangoes, 3 coconuts and 4 bananas is Rs 182. What is the cost of 1 mango and 1 coconut?

QUESTION ID:10

The largest integer between 1 and 105 when written in words that does not contain the letter 'N' or 'n' in its name is

QUESTION ID:11

In a class, boys secure 69% marks on the average while girls secure 72% marks on the average. If the average marks of the entire class is 70% which of the following statements is valid?

QUESTION ID:12

A ball of moulding clay, whose radius is a, is remoulded into a cube. What is the approximate length of the side of the largest cube that can be so made?

QUESTION ID:13

The following spider diagram shows the marks obtained (out of 10) by three students in five tests.
Which one of the following is INCORRECT?

QUESTION ID:14

The difference between a three-digit number (with non-repeating digits) and the same number in the reverse order is always divisible by

QUESTION ID:15

If Pencils are Erasers, some Erasers are Sharpeners, some Erasers are Crayons, no Crayons are Sharpeners but some Crayons are Pencils then in the given Venn diagram, which of the following is represented by the shaded area?

QUESTION ID:16

A pen, pencil and an eraser together cost Rs. 21. The pen costs as much more than the pencil as the pencil does than the eraser. How much does the pencil cost?

QUESTION ID:17

A cardboard sheet of size 60 cm x 60 cm is used to make hollow cubes having sides of 5 cm. What is the maximum number of cubes that can be made?

QUESTION ID:18

If liars always lie and truthful persons never, and in a group of 10 persons everyone calls all others liars, then the number of liars among the 10 is

QUESTION ID:19

Three comparable brands of 1 litre cans of a liquid detergent are available in a shop with different offers as shown in the table.
If 4 litres of detergent is to be purchased, then the best choice (based on unit price) would be

QUESTION ID:20

In a family of two males and three females, A is the daughter of B and sister of C. Eis the spouse of 8 and mother of D. C is not the brother of D. Which of the following statements is NOT correct?

QUESTION ID:21

Which of the following biogeographic realms are divided by the Wallace Line?

QUESTION ID:22

Loss of function mutations in snapdragon (Antirrhinum) genes CYCLOIDEA (CYC) and DICHOTOMA (D/CH) will result in the

QUESTION ID:23

Which one of the following hormones is NOT exclusively synthesized from a single location in the body?

QUESTION ID:24

The trp operon can be induced by the addition of indole propionic acid (IPA), which binds to the trp repressor but does not allow the change in conformation. Upon the addition of IPA, what will be the order of the translation of the enzymes encoded by the operon?

QUESTION ID:25

In which one the following, the proton motive force generated in mitochondrial electron transport is NOT used?

QUESTION ID:26

Which one of the following compounds can serve as a direct acceptor of an additional amino group derived from amino acid catabolism?

QUESTION ID:27

Which one of the following statements best describes an acrosomal reaction?

QUESTION ID:28

Which one of the following is NOT an example of programmed cell death in plants?

QUESTION ID:29

The immune recognition of "self-molecules" is important for which of the following events?

QUESTION ID:30

The Ti plasmid from Agrobacterium tumefaciens has genes for auxin, cytokinin and opine synthesis while genes for opine catabolism and Vir genes lie outside the T-DNA region. Which one of the following genes are involved in providing carbon source to Agrobacterium in their ecological niche?

QUESTION ID:31

Among the organelles listed below, which one does NOT obtain proteins via vesicular transport?

QUESTION ID:32

Which one of the following statements is INCORRECT?

QUESTION ID:33

Greenhouse Gas emissions are considered the primary driver of global warming through their influence on the radiative forcing of the atmosphere. This radiative forcing occurs because

QUESTION ID:34

Natural selection can maintain genetic polymorphisms. Which one of the following CAN NOT contribute to the maintenance of polymorphisms?

QUESTION ID:35

Which one of the following statements regarding the invasion of blast fungus, Magnaporthe oryzae in rice is INCORRECT?

QUESTION ID:36

Runaway selection was proposed by R. A. Fisher to explain the evolution of extravagant secondary sexual characters. The model is based on the exaggeration of characters in male, and female choice for these exaggerated characters. Which one of the following statements is considered an assumption of this model?

QUESTION ID:37

Which one of the following gases diffuses through alveolocapillary membrane in shortest time at the resting condition?

QUESTION ID:38

Mitotic cyclin increases gradually through the G2 phase of the cell cycle but the activity of mitotic CDK1 increases suddenly at the onset of M phase. This is because

QUESTION ID:39

A yeast strain has accumulated a mutation that makes it grow slowly. Investigation reveals that ribosomal RNA levels have dropped drastically in this strain. Which RNA polymerase is likely to be mutated in this strain?

QUESTION ID:40

Which one of the following is the strongest oxidizing agent produced during photosynthesis?

QUESTION ID:41

A Drosophila stock that is heterozygous null for a unique nuclear target gene was sib-mated. The target gene is essential for the development of Drosophila. The embryos from the cross were analyzed and the following results were obtained:
• PCR analysis of the genomic DNA isolated from embryos showed that 25% of the embryos did not have the target gene.
• Northern analysis of the RNA isolated from the above embryos showed the presence of transcript corresponding to the target gene.
• No lethality was observed in the progeny.
Which one of the following options can best explain the above observations?

QUESTION ID:42

Two students performed an ELISA to determine the amount of anti-Spike antibody in serum of a Covid-19 patient. They used the same ELISA plates, the same reagents for coating, blocking and detection, and the same ELISA reader.
Both generated independent standard curves of absorbance vs concentration using the same Spike protein. Student 'A' correctly reported a concentration of 100 μg/ml, but student 'B' reported 450 μg/ml. Which one of the following could most likely explain the wrong result of student 'B'?

QUESTION ID:43

Which one of the following is considered as a renal hormone?

QUESTION ID:44

When E. coli and macrophages are placed in a petri dish with medium, the macrophages internalize the E. coli into cytoplasmic vesicles called phagosomes, which then fuse with lysosomes where the bacteria are killed. If E. coli is replaced by M. tuberculosis in the petri dish, which ONE of the following options will happen after attachment of the bacteria?

QUESTION ID:45

Which of following is a likely consequence of a loss of function mutation in the gene encoding the enzyme phenylalanine ammonia-lyase (PAL) in coffee plants?

QUESTION ID:46

Which one of the following statements is correct with respect to 95% confidence interval of the estimated mean from a set of observations?

QUESTION ID:47

Which one of the following is most commonly used for barcoding-based identification of animal species?

QUESTION ID:48

The pedigree in Panel (i) represents the inheritance pattern of a given trait. Then trait is NOT 100% penetrant. Panel (ii) represents PCR amplification profile of each member of the family using a specific primer pair. (M: mother, F: father, C: child)
What is the mode of inheritance of this trait?

QUESTION ID:49

The proponents of sustainable development argue for a switch to a predominantly plant-based diet, in order to reduce the human footprint of food production. The statements given below present some of the arguments put forward by them.

QUESTION ID:50

Which one of the statements about bacterial operons is INCORRECT?

QUESTION ID:51

The pH of water in Lonar lake was found to be 10.5, 10.3, 10.1, 10.4, 10.7, and 10.4 for measurements taken once daily over six days. What would be the average pH of the lake water during this period?

QUESTION ID:52

Which one of the following statements regarding genetics of quantitative traits in plants is INCORRECT?

QUESTION ID:53

Topoisomerase activity was measured in terms of change in the linking number of DNA in the presence of Camptothecin (inhibitor of Topoisomerase I) or Etoposide (inhibitor of Topoisomerase 11). Which one of the following is the correct expected outcome?

QUESTION ID:54

Which one of the statements about homoplasy is NOT true?

QUESTION ID:55

How many molecules of acetyl-CoA condense to produce isopentenyl diphosphate, the precursor for the formation of terpenoids by mevalonate pathway?

QUESTION ID:56

Mutations in a specific mammalian signaling pathway result in early defects observed in the establishment or maintenance of midline structures, such as the notochord and the floor plate. Later defects include the absence of distal limb structures, ventral cell types within the neural tube, spinal column and most of the ribs and cyclopia. Mutations in which one of the following signaling pathways is the most reported cause for these congenital defects?

QUESTION ID:57

Which one of the following properties of grooves is a hallmark of the Z-form of DNA?

QUESTION ID:58

Normal human fibroblasts, cancer cells (that originated in stem cells) and fibroblasts transduced with hTERT (hTERT cells) were passaged for 35 generations. Southern blot analysis was performed using DNA from above cells using radio-labelled probes for telomeric sequences. Which one of the following band patterns would be observed in the autoradiogram?

QUESTION ID:59

The Burgess Shale in the Canadian Rocky Mountains is known for its Cambrian fossils. This site is abundant in which one of the following fossil assemblages?

QUESTION ID:60

Which one of the following adrenoceptors decreases cAMP in the post-synaptic target after stimulation with norepinephrine?

QUESTION ID:61

Which one of the following statements regarding the stereoisomers of D-glucose is INCORRECT?

QUESTION ID:62

A 160 kDa complex of four protein molecules, consists of a dimer formed by a 25 kDa protein connected by two disulfide bonds. and three other proteins of 10, 30 and 70 kDa, respectively. It was isolated and analyzed on an SDS-PAGE gel without DTT in the gel loading dye. Which one of the following options would represent the SDS-PAGE profile?

QUESTION ID:63

Which one of the following is an example of parametric statistical test?

QUESTION ID:64

Which one of the following organisms is NOT paedomorphic?

QUESTION ID:65

In the thymus of a normal mouse, positive selection of T cells is based on recognition of which of the following?

QUESTION ID:66

The term gynodioecious species refers to plants with

QUESTION ID:67

Ian Pavlov conducted experiments to demonstrate that a dog that associates the sound of a bell with food, would salivate on hearing the bell even when the food was not presented. This is an example of

QUESTION ID:68

Which one of the following molecular phylogenetic trees depicts the correct relationship among invertebrates?

QUESTION ID:69

The following graphs represent plots for the volume (dotted lines) and bacterial viable cell count curves (solid line) for a fermenter culture.
Which one of the following corresponds to the features applicable to a fedbatch mode of fermenter culture?

QUESTION ID:70

Which ot the following describes 'Empty Forest'?

QUESTION ID:71

The following statements refer to mechanisms that may confer resistance to antibiotics in bacteria.
A. Enzymes that can break down the antibiotic.
B. Efflux systems to pump out the antibiotic.
C. CRISPR-mediated defence against the antibiotic.
D. Antitoxins that can sequester the antibiotic.
E. Cell wall modification.
Which one of the following options represent the cornbination or all correct statements?

QUESTION ID:72

In hot environment, some changes occur in the human body to improve heat tolerance, which is called heat acclimatization. The following suggested statements describe the physiological adjustments during heat acclimatization:
A. Vasoconstriction starts in skin at a lower body temperature.
B. Salt concentration in sweat is increased.
C. The sweat secretion over the skin is more effectively distributed for optimum use of the effective surface area for evaporative cooling.
D. The sweat glands maintain high output for longer periods.
E. The threshold for start of sweating is increased.
Which one of the following options represents the combination of the correct statements?

QUESTION ID:73

The following four DNA oligos are mixed in equimolar concentration, heated to 95°C, and slowly annealed in a microcentrifuge tube.
5' GCG GGA ATT TA 3'
5' GCC TAC TCC CGC 3'
5' CGA TGG GTA GGC 3'
5' TAA ATC CAT CG 3'
Which of the following secondary structures will predominantly be present?

QUESTION ID:74

Isolated mitochondria were either treated with protease or first briefly incubated in hypotonic solution prior to treatment with protease. The reaction was stopped and samples were probed for presence of Mtg2, Porin (at the outer membrane), Cyt c (in the inter-membrane space) and KOH (in the matrix) using western blot analyses.
Based on the gels above, Mtg2 is localized

QUESTION ID:75

A researcher wants to stitch two fragments of DNA, "A" and "B" (shown in the figure below), using PCR. She uses primer pairs "a" and "b" to amplify DNA "A". Thereafter, she mixes equal concentrations of PCR amplified "A" and DNA "B" to set up a PCR using primers " a' "and "c".
The plus strand sequences of the two DNA fragments are given below (" ...." stands for any of the four nucleotides):
A:  5'-AGAGAGAGAGAGAGAG ..................G AGAGAGAGAGAGAGAGAGAG - 3'
B:  5'-AGCTTGCA TGCCTGCAGGTCGACT ........................... T AGACGATGA - 3'

Which one of the following options represents the correct sequence of primer "b"?

QUESTION ID:76

Mutants of bacteriophage that carry deletions can be used to rapidly locate mutational sites of newly obtained mutants . The mapping is based on whether wild type recombinants can be recovered when the deletion mutant and the novel mutant are brought together .
Four independent deletions (1 to 4) of a region were used to map 4 novel mutations (A to D).
The deletions (starting from a fixed site) are shown below (the lines denote the region of deletion):
The results of mapping are summarized in the table, where '+' denotes the recovery of wild type recombinants and'-' the inability to do so.
Further it was observed
• that out of the 4 novel mutants no revertant was observed for mutant A
• mutant Band C do not complement each other
The following conclusions were made:
A. Mutation A lies within the region of deletion 1.
B. Mutations can be ordered as A-D -B-C.
C. Mutant A could be a deletion.
D. Mutants Band C are located on 2 independent cistrons.
Which one of the following options represents a combination of all correct statements?

QUESTION ID:77

Select the statement that describes Weberian ossicles.

QUESTION ID:78

Following statements were made for the production of cisgenic plants.
A. In cisgenics, the donor sequence does not necessarily replace the native gene sequence but is added to the recipient species.
B. Cisgenic plants might contain DNA sequences such as T-DNA borders from the plasmid vector.
C. Insertion of a cisgene may result in a gene mutation at the site of insertion similar to that of transgenics.
D. With regard to the species gene pool, cisgenesis does not alter the gene pool of the recipient species.
E. Both cisgenesis and transgenesis can use the same DNA transformation methods to introduce the respective gene constructs into the recipient plants.
Which one of the following options represents the combination of all correct statements?

QUESTION ID:79

Given below are mammals and their location in India:

Mammal

Location

a. Hangul

i.

Little Rann of Kutch

b. Golden Langur

ii.

Manas National Park

c. Sangai

iii.

Dachigam National Park

d. Wild Ass

iv.

Keibul Lamjao National Park

Which one of the following options represents the correct match between the mammals and their locations?

QUESTION ID:80

The cadherin catenin complex is extremely important during compaction from a morula to the blastula. Transition of early embryonic cells into a blastula differed depending on the presence or absence of calcium ions. In addition, an investigator blocked the expression of β-catenin using vivo morpholinos to detect its effect simultaneously on compaction. Which one of the following conditions will lead to the most successful transition of the morula into the blastula?

QUESTION ID:81

A tree grows at 0.5 meter per day under optimal tropical conditions. Assuming the stem consists entirely of cellulose fibers, how many D-glucose residues must be added per second to reach the above growth rate? The length of D-glucose in cellulose is about 0.45 nm.

QUESTION ID:82

In a population with density-dependent effects on births and deaths due to intraspecific competition, the net recruitment curve is dome-shaped because

QUESTION ID:83

The statements given below indicate key characteristics of a geographical region .
A. Contains at least 1500 species of endemic animals
B. Contains at least 1500 species of endemic vascular plants
C . Has lost 70% of its original natural vegetation
D. Has lost 30% of its original natural vegetation

Which one of the following combinations represents the correct criteria for declaring an area as a biodiversity hotspot?

QUESTION ID:84

The mutation rate refers to the frequency at which new mutations arise in the genome of an organism and is typically expressed as:
Mutation rate=Number of observed mutations/Total number of opportunities for mutations
Which one of the following factors will NOT influence the opportunities for mutations?

QUESTION ID:85

Consider a species of group-living bird in which individuals produce alarm calls to alert group members of the presence of a predator. The alarm call confers fitness benefits to the caller as it helps group members (composed of genetic relatives) escape the predator. However, alarm calling also makes the caller more conspicuous to the predator. Individuals of this species in a population have four phenotypes for the loudness of alarm calls they produce in the order P < Q < R < S. The graph below gives the cost and benefit functions for alarm calling behaviour for the four phenotypes.
Which one of the following phenotype frequencies represents the correct outcome of natural selection?

QUESTION ID:86

In the figure below, which of the curves that relate current reproductive effort with future reproductive value are likely to favor semelparous reproduction?

QUESTION ID:87

The table below represents a list of geographical regions and avian fauna.

Geographical region

Avian fauna

a. Western Himalayas

i.

Rufous babbler

b. Western Ghats

ii.

Narcondam hornbill

c. Peninsular India

iii.

Red crossbill

d. Andaman-Nicobar Archipelago

iv.

Yellow-throated bulbul

Which one of the following options represents the combination of all correct matches:

QUESTION ID:88

The phylogenetic tree given below shows single nucleotide polymorphisms observed among four individuals of the scorpion species Deccanometrus benga/ensis.
Select the option that represents the correct combination of ancestral nucleotides at nodes X, Y and Z using the principle of parsimony.

QUESTION ID:89

The surface electrostatic potential map of an 18 kDa protein is shown below. Shades of blue and red on the surface denote positively and negatively charged surfaces, respectively.
Which one of the options represents the most likely natural substrate/s for the protein?

QUESTION ID:90

A region of a eukaryotic chromosome is heavily transcribed by RNA polymerase-
ll. Given below are a few properties of such a chromatin.
A. DNasel hypersensitivity
B. High CpG methylation
C. Occupied by macroH2A
D. High histone acetylation

Choose the option that has all correct properties.

QUESTION ID:91

Different segments of the renal tubule (Column X) and the sodium transporter in the apical membrane of tubular cells (Column Y) are listed below:

Column X

Column Y

Renal tubular segment

Apical transporter

a. Proximal tubule

i

Na+ channel (ENaC)

b. Collecting duct

ii

Na+−K+−2Cl- co-transporter

c. Thick ascending limb

iii

Na+−Cl- co-transporter

d. Distal convoluted tubule

iv

Na+-amino acid co-transporter

Which one of the following options represents the correct match between Column X and Column Y?

QUESTION ID:92

In the table given below, match the national parks with the mountain range in India where they are located.

National parks

Mountain range

P. Silent Valley

i.

Western Ghats

Q. Neora Valley

ii.

Eastern Himalayas

R. Valley of Flowers

iii.

Western Himalayas

S. Pin Valley

Which one of the following options represents all correct combinations?

QUESTION ID:93

Protein A binds the mRNA for gene B in Hela cells. The protein A mediates the formation of mRNA-protein particles (mRNPs). The addition of a chemical C disrupts mRNPs in Hela cells. The results of the western blot and northern blot analyses are shown below:

From the above experiments, which one of the following statements is true?

QUESTION ID:94

Different phases of a typical nerve fibre action potential are explained in the following statements:
A. The membrane potential is brought to the threshold potential (firing level) due to the opening of some voltage-gated sodium channels in response to a threshold depolarizing stimulus.
B. The rapid depolarization after the firing level is caused by opening of more voltage-gated sodium channels and entry of Na+ into the nerve fibre.
C. The reversal of membrane potential (overshoot) at the peak of action potential occurs as membrane potential moves towards the equilibrium potential of K+.
D. The peak voltage of action potential does not reach the equilibrium potential of K+ primarily because the increase of K+ conductance is short-lived.

Which one of the following options represents the combination of the correct statements?

QUESTION ID:95

Male mating systems have evolved in response to female mating strategies and ecological factors that determine spatial distribution of females. In the table given below, column A represents different mating systems and column B represents different ecological conditions.

Column A

Column B

P. Resource defense polygyny

i.

Resource is abundant and occurs all over the habitat

Q. Lek Mating

ii.

Resource is abundant and occurs in clumps

R. Monogamy

iii.

Resource is limited and occurrence is unpredictable

Which one of the following statements represents all correct combinations for the kind of mating system with the corresponding ecological condition?

QUESTION ID:96

Following are certain statements regarding NADP-malic enzyme type of C4 photosynthesis:
A. Malate synthesized from oxaloacetate in mesophyll cells is transported to bundle sheath cells.
B. Pyruvate formed in the bundle sheath cells is transported to mesophyll cells.
C. Aspartate synthesized from oxaloacetate in mesophyll cells is transported to the bundle sheath cells and again gets converted into oxaloacetate.
D. Alanine aminotransferase converts pyruvate into alanine in the bundle sheath cells.
E. Oxaloacetate is converted into aspartate, by aspartate aminotransferase in the mesophyll cell.

Which one of the following options represents the combination of all correct statements?

QUESTION ID:97

A receptor tyrosine kinase (RTK) dimerizes and autophosphorylates in presence of a ligand. A researcher prepares three constructs that express either the (A) full-length protein having a kinase domain as well as 3 tyrosine residues, (B) the RTK with a non functional kinase domain but with the 3 tyrosine residues, and (C) the RTK lacking the 3 tyrosine residues but having a functional kinase domain. She expressed these constructs in cell lines lacking the RTK, either singly or in combinations shown in the figure, breaks open the cell and added the ligand of the RTK in presence of radio-labelled ATP. She immunoprecipitated the RTK and analysed the immunoprecipitates by Coomassie staining as shown in the figure, followed by autoradiography.

Which one of the following autoradiograms would the researcher expect?

QUESTION ID:98

Match the major cell cycle regulatory proteins in Column (X) and their typical function in Column (Y)

Column X

Column Y

A. Wee1

(i)

suppresses G1/S-Cdk and S-Cdk activities after DNA damage

B. p27

(ii)

phosphorylates inhibitory sites in Cdk

C. p21

(iii)

activates APC/C in late mitosis and early G1 phase

D. Cdh1

(iv)

suppresses G1/S-Cdk and S-Cdk activities in G1 phase

Which one of the following options represents the correct match between column X and column Y?  

QUESTION ID:99

An enzyme has a Km of 1 mM. Addition of different inhibitors changes Km and/or Vmax given as Kmapp and Vmaxapp (app for apparent), respecitively. Which one of the following inhibitors will result in the lowest rate of enzyme-catalyzed reaction? 

QUESTION ID:100

Given below are a few statements related to inheritance biology.
A. Quantitative traits are characterized by discontinuous variations in the phenotype.
B. Polygenic traits never show a normal distribution of phenotypic variability.
C. Association mapping captures wider genetic diversity than biparental linkage mapping.
D. Bulked segregant analysis can be used for mapping of monogenic qualitative traits.

Which one of the following options represents a combination of all correct statements?

QUESTION ID:101

In a quadrat sample for tree species in a plantation, 20 species were found in almost equal abundance. The Shannon's index of diversity is approximately

QUESTION ID:102

The following statements are made regarding formulation of the advanced candidate antimalaria vaccine RTS,S.
A. It contains heat-killed Plasmodium fa/ciparum sporozoites and Hepatitis B surface antigen.
B. It contains formalin-inactivated P/asmodium falciparum sporozoites and attenuated poliovirus.
C. It contains a fusion protein between Plasmodium falciparum CSP Cterminal region and Hepatitis B surface antigen.
D. It contains a fusion protein between P/asmodium falciparum Merozoitesurface protein and CSP.

Which one of the following options represents the combination of all correct statements?

QUESTION ID:103

Given below are a list of sub-cellular compartments (Column X) and markers (Column Y).

Column X

Column Y

Subcellular compartments

Markers

A Endoplasmic reticulum

i

LC3b

B Golgi apparatus

ii

HSP60

C Autophagosome

iii

Protein disulphide isomerase

D Mitochondria

iv

Mannosidase II

Which one of the following options correctly matches the subcellular compartments with their markers?  

QUESTION ID:104

The following statements are made about the killing of virus-infected respiratory epithelial cells by cytotoxic T cells:
A. Priming of the T cells has taken place in thymus, lymph node or spleen.
B. Viral antigens have been presented on infected epithelial cells.
C. MHC-I molecules have been presented on infected epithelial cells.
D. MHC-11 molecules have been presented on infected epithelial cells.

Which one of the following options represents the combination of all correct statements?

QUESTION ID:105

Plants perceive effector molecules of a pathogen and mount a series of events that lead to the activation of a defense response. Following statements are made with respect to events that occur within a few minutes of the effector perception.
A. Transient change in the ion permeability of the plasma membrane .
B. Efflux of K+ and cl- ions from the cell.
C. Influx of ca2+ and H + ions into the cell.
D. Influx of K+ and cl- ions into the cell and efflux of ca2+ and H+ ions from the cell.

Which one of the following options represents the combination of all correct statements?

QUESTION ID:106

According to ABCDE model of flower development, different combinations of MADS box proteins belonging to class A, B, C, D and E bind to each other to form a tetrameric structure referred to as "floral quartet" as given below. The floral quartet bind to DNA to activate transcription of the genes needed to specify each floral organ types.
AP1 = APETALA 1, AP3 = APETALA 3, Pl= PISTILLATA, AG= AGAMOUS
STK = SEEDSTICK, SHP = SHATTEKPKOOF, SEP= SEPALLATA 1/2/3


Which one of the following options represents the combination of floral quartets that specify petals and carpel whorl of flower, respectively?

QUESTION ID:107

Wild-type Drosophila have a pair of wings on one segment and a pair of halteres on the adjacent posterior segment. Wild type four-winged insects like dragonflies do not have halteres. Ultrabithorax (Ubx) is a homeobox gene. Ubx mutants of Drosophila have two pairs of wings and no halteres. In relation to Ubx function, the two-winged and four-winged insect species differ based on

QUESTION ID:108

The figure summarizes the observation following a cross between two haploid strains of Neurospora crassa having alleles A and a, respectively.

 

The following statements were made:

A. In 'I', segregation of alleles occurred in Anaphase II.

B. Crossing over between the centromere and the gene occurred in 20% of the meiocytes.

C. With reference to the two non-recombinant parental chromosomes, there are 6 different ways by which they can orient themselves at the equatorial plate.

D. The gene is 20cM away from the centromere.

Which one of the following options represents a combination of all correct statements?

QUESTION ID:109

Certain statements are made below about hemoglobin.
A. HbA1c has glucose attached to the terminal valine i n each β chain.
B. NADH-methemoglobin reductase system in RBC converts methemoglobin to hemoglobin.
C. 02 binds to the Fe2+ in the heme moiety of hemoglobin to form oxyhemoglobin.
D. The affinity of hemoglobin for 02 is much higher than that of its affinity for carbon monoxide.

Which one of the following options represents combination of all correct statements?

QUESTION ID:110

Different leads used in electrocardiography (Column X) and the electrode placement and connections (Column Y) are listed below: 

Column X

Column Y

ECG leads

Electrode placement and connections

a. Standard limb lead I

i

Left leg - positive

Right arm - negative

b. Standard limb lead II

ii

Left leg- positive

Left arm- negative

c. Standard limb lead III

iii

Right arm- positive,

Left arm and left leg connected together- negative

d. Augmented limb lead aVR

iv

Left arm - positive

Right arm - negative

Which one of the following options represents the correct match between Column X and Column Y?

QUESTION ID:111

The following tree shows phylogenetic relationships between species A to D

Which of the following molecular mechanisms would be responsible for the phylogenetic relationships shown between species A to D?

QUESTION ID:112

Single-stranded DNA binding properties of three DNA repair proteins (A, B, and C) were investigated. A biotinylated single-stranded DNA was prepared and incubated with the proteins in different combinations as shown below. This was followed by streptavidin pull-down to enrich ssDNA-bound proteins, which were detected by western blot analyses using specific antibodies.