Previous Year Questions

TLS Online TPP Program

QUESTION ID:1

Deficiency of the enzyme phenylalanine hydroxylase causes Phenylketonuria. Phenylalanine hydroxylase converts phenylalanine to

tryptophan

alanine

tyrosine

threonine

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32769&year=2020&month=February

QUESTION ID:2

T cells and B cells are

lymphocytes

erythrocytes

epithelial cells

squamous cells

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32770&year=2020&month=February

QUESTION ID:3

In humans, the testis temperature is maintained below the core body temperature with the help of

proximal tubule

loop of Henle

scrotum

seminal vesicles

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32771&year=2020&month=February

QUESTION ID:4

Protein that helps other proteins to fold correctly is

chaperone

proteasome

ubiquitin

desmosome

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32772&year=2020&month=February

QUESTION ID:5

The CORRECT sequence of phases during mitosis is

prophase, metaphase, anaphase, telophase

prophase, anaphase, metaphase, telophase

anaphase, prophase, metaphase, telophase

anaphase, metaphase, prophase, telophase

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32773&year=2020&month=February

QUESTION ID:6

The curve y = x⁴- 4x³+ 4x²- 4 has tangents parallel to the x-axis at the following points (x, y)

(1, 4), (−2, 2) and (0, −1)

(0, −4), (2, −4) and (1, −3)

(−1, 2), (−2, 1) and (1, −2

(1, −4), (1, −3) and (2, −4)

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32774&year=2020&month=February

QUESTION ID:7

In viruses, capsids are made up of

proteins

nucleic acids

lipids

sterols

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32775&year=2020&month=February

QUESTION ID:8

The common component in crustacean exoskeleton and fungal cell wall is

lignin

cellulose

chitin

peptidoglycan

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32776&year=2020&month=February

QUESTION ID:9

The CORRECT sequence of evolution (simplest to complex) is

algae, bryophytes, ferns, angiosperms

algae, ferns, bryophytes, angiosperms

bryophytes, ferns, algae, angiosperms

bryophytes, algae, ferns, angiosperms

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32777&year=2020&month=February

QUESTION ID:10

For an ideal gas at room temperature, choose the CORRECT representation(s) of Boyle’s Law. (P = Pressure, V = Volume, T = Temperature)

only (i)

both (ii) and (iii)

only (iii)

both (iii) and (iv)

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32778&year=2020&month=February

QUESTION ID:11

During El Niño,

cold water of the north flowing Peru current is displaced by a low-nutrient warm southward current

warm water of the north flowing Peru current is displaced by a low-nutrient cold southward current

cold water of the south flowing Peru current is displaced by a warm northward current rich in nutrients

warm water of the south flowing Peru current is displaced by a cold northward current rich in nutrients

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32779&year=2020&month=February

QUESTION ID:12

Match the deficiency conditions in Group I with the corresponding vitamin in Group II

P-3, Q-2, R-1, S-4

P-2, Q-3, R-4, S-1

P-3, Q-1, R-4, S-2

P-1, Q-2, R-3, S-4

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32780&year=2020&month=February

QUESTION ID:13

Eutrophication refers to an aging process from a

low production ecosystem to high production ecosystem due to availability of excess nutrients

high production ecosystem to low production ecosystem due to nutrient deficiency

high production ecosystem to low production ecosystem due to light scarcity

low production ecosystem to high production ecosystem due to light scarcity

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32781&year=2020&month=February

QUESTION ID:14

Which one of the following ions has the maximum number of unpaired electrons?

Cu²⁺

Na⁺

Cr³⁺

Fe³⁺

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32782&year=2020&month=February

QUESTION ID:15

Match the enzymes in Group I with the corresponding substrate in Group II

P-2, Q-3, R-1, S-4

P-4, Q-1, R-2, S-3

P-3, Q-1, R-4, S-2

P-4, Q-2, R-3, S-1

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32783&year=2020&month=February

QUESTION ID:16

In ABO blood group testing, which one of the following is INCORRECT

A group – agglutination with anti-A antibodies

B group – agglutination with anti-B antibodies

AB group – no agglutination with either anti-A or anti-B antibodies

O group – no agglutination with either anti-A or anti-B antibodies

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32784&year=2020&month=February

QUESTION ID:17

If a coin is tossed three times, what is the probability that NO two successive tosses show the same face?

0.25

0.33

0.20

0.125

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32785&year=2020&month=February

QUESTION ID:18

Match the RNAs in Group I with their corresponding function in Group II

P-4, Q-3, R-2, S-1

P-4, Q-1, R-3, S-2

P-3, Q-2, R-1, S-4

P-2, Q-4, R-1, S-3

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32786&year=2020&month=February

QUESTION ID:19

In a typical mammalian cell, the protein content is 20 % of its net weight. If the density and volume of the cell are 1.2 g/mL and 4 × 10⁻⁹ mL, respectively, then the concentration (in mg/mL) of the protein is

600

166

240

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32787&year=2020&month=February

QUESTION ID:20

Consider a spherical particle of mass m and radius r moving in a medium. Its velocity at any time t is given by where 𝑣₀ is initial velocity of the particle. The dimensions of X are

MLT^-1

M^-1LT

ML^-1T ^-1

Dimensionless

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32788&year=2020&month=February

QUESTION ID:21

Match the type of bacterial flagella in Group I with their definitions in Group II

P-4, Q-1, R-2, S-3

P-4, Q-3, R-2, S-1

P-4, Q-3, R-1, S-2

P-3, Q-1, R-4, S-2

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32789&year=2020&month=February

QUESTION ID:22

Consider monoatomic ideal gas molecules of equal mass 𝑚 in thermal equilibrium, at temperature 𝑇. Which one of the following equations is correct? (the angular brackets denote average, 𝑘_𝐵 is Boltzmann constant, 𝑣 is velocity, and v_x is the x-component of velocity)

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32790&year=2020&month=February

QUESTION ID:23

Match the diseases in Group I with their causative organisms in Group II

P-2, Q-1, R-4, S-3

P-3, Q-4, R-2, S-1

P-2, Q-3, R-4, S-1

P-3, Q-1, R-4, S-2

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32791&year=2020&month=February

QUESTION ID:24

Determine the correctness or otherwise of the following

Assertion [a] and the Reason [r]. Assertion [a]: The difference in the respective melting points of butter and coconut oil is caused by the degrees of saturation of the corresponding fatty acid chain.

Reason [r]: Unsaturated fatty acid chains in fats/lipids become solid more easily because they are relatively straight and thus able to pack together more closely than saturated chain.

Both [a] and [r] are true and [r] is the correct reason for [a]

Both [a] and [r] are true but [r] is not the correct reason for [a]

Both [a] and [r] are false

[a] is true but [r] is false

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32792&year=2020&month=February

QUESTION ID:25

Match the techniques in Group I with their applications in Group II for protein analysis

P-3, Q-1, R-2, S-4

P-4, Q-1, R-2, S-3

P-2, Q-1, R-4, S-3

P-3, Q-4, R-1, S-2

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32793&year=2020&month=February

QUESTION ID:26

The following carboxylic acids have a general formula, R-COOH.

(i) HCOOH

(ii) CH₃ - COOH

(iii) ClCH₂ - COOH

(iv) CF₃ - COOH

Which one of the following represents the decreasing order of their respective 𝑝𝐾𝑎 values?

i > ii > iii > iv

ii > i > iii > iv

iv > iii > i > ii

iv > iii > ii > i

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32794&year=2020&month=February

QUESTION ID:27

Which one of the following compounds is the simplest alkane that is optically active?

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32795&year=2020&month=February

QUESTION ID:28

In the following reaction, X is an intermediate and Y is one of the end products.

Which one of the following compounds is the end product Y?

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32796&year=2020&month=February

QUESTION ID:29

Determine the correctness or otherwise of the following

Assertion [a] and the Reason [r]. Assertion [a]: lac operon is an inducible operon.

Reason [r]: lac operon is not induced when the repressor protein remains bound to operator DNA sequence.

Both [a] and [r] are true and [r] is the correct reason for [a]

Both [a] and [r] are true but [r] is not the correct reason for [a]

Both [a] and [r] are false

[a] is true but [r] is false

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32797&year=2020&month=February

QUESTION ID:30

IR spectrum of a compound C₅H₁₀O shows a band at 1715 cm^-1 . The same compound showed two signals, a triplet and a quartet, in its NMR spectrum. Identify the compound from the following.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32798&year=2020&month=February

QUESTION ID:31

Which of the following is(are) auxins?

1-Naphthaleneacetic acid

Indole-3-butyric acid

2,4-Dichlorophenoxyacetic acid

Indole-3-acetic acid

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32799&year=2020&month=February

QUESTION ID:32

Which of the following is(are) TRUE about photosynthesis?

In C3 plants the first organic product of carbon fixation is 3-phosphoglycerate

In C4 plants the first organic product of carbon fixation is oxaloacetate

Crassulacean acid metabolism occurs in succulent plants living in arid conditions

Oxygen is generated from carbon dioxide

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32800&year=2020&month=February

QUESTION ID:33

Which of the following is(are) involved in the activation of cytotoxic T cells?

MHC I

FcR

T cell receptor

CTLA 4

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32801&year=2020&month=February

QUESTION ID:34

DNA and RNA are acidic in nature due to the presence of

pentose sugar

nitrogenous bases

phosphate groups

large number of hydrogen bonds

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32802&year=2020&month=February

QUESTION ID:35

Which of the following is(are) CORRECT?

Light has wave nature only

Light can have both wave and particle nature

Photo electric effect shows that light can behave like particles

Interference experiments show that light behaves like particles

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32803&year=2020&month=February

QUESTION ID:36

Protozoa are

unicellular

multicellular

eukaryotic

prokaryotic

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32804&year=2020&month=February

QUESTION ID:37

Which of the following curve/straight line equations will pass through the origin when plotted on a graph?

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32805&year=2020&month=February

QUESTION ID:38

Consider two bodies with equal masses of 10¹² kg each and R distance apart. Let G be the gravitational constant and V₀ be a constant with dimensions of energy. Which of the following represent(s) gravitational potential energy (V) between the bodies, such that Newton’s law of gravitation is valid?

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32806&year=2020&month=February

QUESTION ID:39

Which of the following is(are) CORRECT?

Both glucose and fructose have the same molecular formula

The positions of the oxygen and carbon differ in the structures of glucose and fructose

Both glucose and fructose have the same physical properties

Both glucose and fructose are monosaccharides

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32807&year=2020&month=February

QUESTION ID:40

Which of the following gas(es) function(s) as signaling molecule(s) in the human nervous system?

Nitric oxide

Carbon monoxide

Helium

Argon

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32808&year=2020&month=February

QUESTION ID:41

The generation time of E. coli is 20 minutes. If there are 10⁶ E. coli present in an exponentially growing synchronous culture, then the average time (in minutes) required to obtain a final population of 4×10⁶ E. coli is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32809&year=2020&month=February

QUESTION ID:42

The solution to the integral rounded off to TWO decimal places, is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32810&year=2020&month=February

QUESTION ID:43

where A^T is the transpose of A and I is the identity matrix. The value of 𝜃 (in degrees) is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32811&year=2020&month=February

QUESTION ID:44

Truth table of a logic gate is given below:

The value of X in the above table is __________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32812&year=2020&month=February

QUESTION ID:45

Consider two particles, each of mass 20 g; the first particle is moving with a speed of 10 m/s along a one-dimensional track in the positive x-direction and collides with the second particle at rest. Assuming that the collision is elastic, the speed (in m/s) of the first particle after the collision is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32813&year=2020&month=February

QUESTION ID:46

In the following reaction, the values of ∆H and ∆S at temperature 25^oC are −13.7 𝑘𝑐𝑎𝑙/𝑚𝑜𝑙𝑒 and −16.0 𝑐𝑎𝑙/(𝐾 ∙ 𝑚𝑜𝑙𝑒), respectively.

Cd²⁺ + 4CH₃NH₂ → Cd(CH₃NH₂)₄²⁺

The value of ∆G (in 𝑘𝑐𝑎𝑙/𝑚𝑜𝑙𝑒) of the reaction, rounded off to TWO decimal places, is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32814&year=2020&month=February

QUESTION ID:47

The volume (in mL) required to prepare 350 mL of 1X buffer solution from a fifty times (50X) concentrated buffer stock solution is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32815&year=2020&month=February

QUESTION ID:48

A compound microscope has its objective with linear magnification of 10. In order to achieve a final magnification of 100, the angular magnification of the eyepiece should be ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32816&year=2020&month=February

QUESTION ID:49

The decimal reduction time (DRT or D value) of a bacterial culture is one minute. If a suspension of the bacterial culture contains an initial population of 10⁶ cells, then the time (in minutes) required to reduce the number of bacteria to 10 by heat treatment is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32817&year=2020&month=February

QUESTION ID:50

The median of Y in the following data is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32818&year=2020&month=February

QUESTION ID:51

A variable number of tandem repeats (VNTR) locus has 15 different alleles. The number of genotypes possible in a population for this VNTR is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32819&year=2020&month=February

QUESTION ID:52

The vibrational frequency (expressed in wavenumber) of ¹H ³⁵Cl is 2990.6 cm^-1 . Assuming that the force constant is same in both the cases, vibrational frequency (in cm^-1 ) of ²D³⁵Cl is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32820&year=2020&month=February

QUESTION ID:53

The length of transverse and conjugate axis in a hyperbola are 6 and 8, respectively. The eccentricity of the hyperbola, rounded off to TWO decimal places, is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32821&year=2020&month=February

QUESTION ID:54

The solution to the limit is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32822&year=2020&month=February

QUESTION ID:55

The average value of function on [−3, 3], rounded off to TWO decimal places, is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32823&year=2020&month=February

QUESTION ID:56

A bouncing ball is dropped from an initial height of ℎ meters above a flat surface. Each time the ball hits the surface, it rebounds a distance 𝑟 × ℎ meters and it bounces indefinitely. Consider the value of ℎ = 5 meters and 𝑟 = 1/3. The total vertical distance (up and down) travelled (in meters) by the ball is ______.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32824&year=2020&month=February

QUESTION ID:57

Energy of the electron in hydrogen atom in its ground state is 13.6 eV. The energy required (in eV) to move the electron from its ground state to the first excited state, rounded off to TWO decimal places, is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32825&year=2020&month=February

QUESTION ID:58

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32826&year=2020&month=February

QUESTION ID:59

At a given time t, velocity (v) and acceleration (a) of a particle undergoing simple harmonic motion are given by

Assuming all quantities are in SI units, the amplitude of the oscillation is ________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32827&year=2020&month=February

QUESTION ID:60

In an enzyme catalyzed first-order reaction, the substrate conversion follows an exponential pattern such that 80 % of the substrate is converted in 10 minutes. The first-order rate constant (in min^-1 ) of the reaction, rounded off to THREE decimal places, is __________.

https://triyambak.org/index.php/courses/iit-jambiotechnology/tpp/pyq?qid=32828&year=2020&month=February