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Previous Year Questions

TLS Online TPP Program

QUESTION ID:1

Which one of the following protozoan parasites belongs to the phylum Apicomplexa? 

QUESTION ID:2

Which one of the following statements is CORRECT for Mycoplasma?

QUESTION ID:3

Which one of the following organelles is enclosed by a single membrane? 

QUESTION ID:4

Pyramid of energy in a forest ecosystem is 

QUESTION ID:5

In the feedback regulation of an enzyme, the end product binds to the 

QUESTION ID:6

What is the source of electrons in photosynthesis? 

QUESTION ID:7

The value of  

QUESTION ID:8


QUESTION ID:9

The logic operation (OR, AND, NOR or NAND) carried out by following circuit is


QUESTION ID:10

The reaction of 11-cis-retinal with the lysine residue of a specific protein forms the lightsensitive pigment in the cells of retina. The light-sensitive pigment is an 


QUESTION ID:11

Viral capsids are made up of morphological subunits called capsomeres. One of the common capsomeres is icosahedral. The icosahedron is a regular polyhedron with 

QUESTION ID:12

Which of the following feature(s) should be present in a protein to generate strong immune response (antibody production) in an animal?

I. At least one B-cell epitope

II. At least one T-cell epitope

III. Proteolytic cleavage site(s)

QUESTION ID:13

Match the entries in Group I with that in Group II.


QUESTION ID:14

Proenzyme pepsinogen is secreted from ‘P’ of gastric mucosa and converted into active enzyme pepsin on exposure to ‘Q’ secreted from ‘R’. Choose the CORRECT combination of P, Q and R.

QUESTION ID:15

When bacteria are grown in glucose-depleted media containing high concentration of lactose, expression of lac operon genes is activated by 

QUESTION ID:16

Match the hormones in Group I with their functions in Group II


QUESTION ID:17

Match the entries in Group I with that in Group II


QUESTION ID:18

Match the entries in Group I with that in Group II


QUESTION ID:19


QUESTION ID:20

The number of three letter words, with or without meaning, which can be formed using letters of the word ‘VIRUS’ without repetition of letters is

QUESTION ID:21

What is the solution of   Given C is an arbitrary constant.

QUESTION ID:22

The area of an equilateral triangle with sides of length α is

QUESTION ID:23

Nucleus of a radioactive material can undergo beta decay with half life of 4 minutes. Suppose beta decay starts with 4096 nuclei at t = 0, the number of nuclei left after 20 minutes would be 

QUESTION ID:24

Which one of the following shows the CORRECT relationship among velocity of light in a medium (𝑣), permittivity of medium (ε) and magnetic permeability of medium (μ)?

QUESTION ID:25

A 30 µF capacitor is connected to a 240 V, 50 Hz source. If the frequency of the source is changed from 50 Hz to 200 Hz, the capacitive reactance of the capacitor will 

QUESTION ID:26

Match the entries in Group I (Mechanical system) with analogous quantities in Group II (Electrical system)

 

QUESTION ID:27

The achiral molecules among the following (I, II, III and IV) are


QUESTION ID:28

Match the entries in Group I with those in Group II 


QUESTION ID:29

Which one of the following statements is CORRECT? 

QUESTION ID:30

In the 1H NMR spectrum, which one of the following compounds will show a triplet?

QUESTION ID:31

Antibody binds to antigen in solution through 

QUESTION ID:32

Plasmid mediated antibiotic resistances in bacteria are acquired by 

QUESTION ID:33

Which of the following statements is/are CORRECT for G protein–coupled receptor (GPCR) mediated signaling? 

QUESTION ID:34

Glucose is incubated with enzymes of glycolytic pathway (except pyruvate kinase), gamma 32P-ATP and unlabeled inorganic phosphate. Which of the following products is/are formed?

QUESTION ID:35

In a double stranded DNA, which of the following ratios is/are always equal to 1? A, T, G and C denote the number of bases. 

QUESTION ID:36

Consider the equation 𝑥3 − 1 = 0. If one of the solutions to this equation is 1, the other solution(s) is/are

QUESTION ID:37

Which of the following statements is/are CORRECT regarding self-inductance of a long solenoid having cross sectional area (𝐴), length (𝑙) and having 𝑛 turns per unit length filled with material of relative permeability 𝜇𝑟 ?

QUESTION ID:38

If an optician prescribes a corrective lens of power -2.0 D, the required lens 

QUESTION ID:39

Which of the following statements is/are CORRECT? 

QUESTION ID:40

Which of the following pairs of compounds can be distinguished by iodoform test performed in ammonium hydroxide? 

QUESTION ID:41

The total number of genetically different types of gametes that will be produced by a heterozygous plant carrying the genotypes AABbCc is _________. 

QUESTION ID:42

A healthy individual has the cardiac output of 5.5 L and heart rate of 72 beats per minute. The stroke volume of the individual is _________ mL.  

QUESTION ID:43

Both strands of a DNA molecule are labeled with radioactive thymidine and are allowed to duplicate in an environment containing non-radioactive thymidine. The number of DNA molecules that will contain radioactive thymidine after three duplications is _________. 

QUESTION ID:44

The number of cycles required for complete degradation of Palmitic acid (16 Carbon) by β-oxidation is __________. 

QUESTION ID:45

The value of logn 4-16 is -32 The value of n is _________.    

QUESTION ID:46

The determinant of the matrix   is _________.

QUESTION ID:47

The equivalent capacitance of following assembly of capacitors is ________ µF.


QUESTION ID:48

The stability of the following carbocation arises from hyperconjugation with _________ number of hydrogen atoms.

 

QUESTION ID:49

Oxidation state of Fe in the complex K3[Fe(CN)5NO] is (+) __________.

QUESTION ID:50

The mechanism of the following reaction involves the formation of a __________ membered ring.


QUESTION ID:51

The concentration of a purified enzyme is 10 mg/mL. Ten microlitres of the enzyme solution in a total reaction volume of 1 mL catalyses the formation of 20 nanomoles of product in one minute under optimum conditions. The specific activity of the enzyme is _________ unit/mg. 

QUESTION ID:52

A 100 nucleotide-long single stranded poly-(A) is synthesized from adenosine monophosphate (AMP) at physiological pH. 

(Atomic mass of C = 12, H = 1, O = 16, P = 31; at physiological pH, Molecular mass of AMP = 345). The molecular mass of the resulting poly-(A) at physiological pH is ___________.

QUESTION ID:53

If a colour-blind woman marries a normal man, the chance that their boy child will be colour-blind is ________%. 

QUESTION ID:54

For a 0.1 M aqueous solution of lysine, the pH at which it carries no net charge is ___________.

(pKa values for: α-carboxylic group = 3.1, α-amino group = 8.0, ε-amino group = 10.8) 

QUESTION ID:55

For a = ________, the following simultaneous equations have an infinite number of solutions:

QUESTION ID:56

If A and B are events such that  the value of  is ___________.

QUESTION ID:57

An ultrasound signal of frequency 50 KHz is sent vertically down into a medium. The signal gets reflected from a depth of 25 mm and returns to source 0.00005 seconds after it is emitted. The wavelength of the ultrasound signal in that medium is ________ cm. 

QUESTION ID:58

The relationship between the applied force F(X) (in Newton) on a body and its displacement X (in metre) is given below. The total amount of work done in moving the body from X = 0 to X = 4 m is ___________ Joule.

 

QUESTION ID:59

The number of axial C-H bond(s) in the major product (P) of the given reaction is ________.

 

QUESTION ID:60

A first order reaction is 87.5% complete at the end of 30 minutes. The half-life of the reaction is __________ minute(s).