IIT JAM BIOTECHNOLOGY 2020

IIT JAM BIOTECHNOLOGY 2020

SECTION – A
MULTIPLE CHOICE QUESTIONS (MCQ)



Q. 1 – Q.10 carry one mark each.
Q.1 Deficiency of the enzyme phenylalanine hydroxylase causes Phenylketonuria. Phenylalanine
hydroxylase converts phenylalanine to

Q.2 T cells and B cells are

Q.3 In humans, the testis temperature is maintained below the core body temperature with the
help of

Q.4 Protein that helps other proteins to fold correctly is

Q.5 The CORRECT sequence of phases during mitosis is

Q.6 The curve y= x4-4x3+4x2-4
has tangents parallel to the x-axis at the following points ( x, y)

Q.7 In viruses, capsids are made up of

Q.8 The common component in crustacean exoskeleton and fungal cell wall is

Q.9 The CORRECT sequence of evolution (simplest to complex) is

Q.10 For an ideal gas at room temperature, choose the CORRECT representation(s) of
Boyle’s Law.
(P = Pressure, V = Volume, T = Temperature)

Q. 11 – Q. 30 carry two marks each.
Q.11 During El Niño,

Q.12 Match the deficiency conditions in Group I with the corresponding vitamin in Group II

Q.13 Eutrophication refers to an aging process from a

Q.14 Which one of the following ions has the maximum number of unpaired electrons?

(A) Cu2+ (B) Na+
(C) Cr3+ (D) Fe3+

Q.15 Match the enzymes in Group I with the corresponding substrate in Group II

Q.16 In ABO blood group testing, which one of the following is INCORRECT

Q.17 If a coin is tossed three times, what is the probability that NO two successive tosses show
the same face?

Q.18 Match the RNAs in Group I with their corresponding function in Group II

Q.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

Q.21 Match the type of bacterial flagella in Group I with their definitions in Group II

Q.23 Match the diseases in Group I with their causative organisms in Group II

Q.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.

Q.25 Match the techniques in Group I with their applications in Group II for protein analysis

Q. 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?

Q.27 Which one of the following compounds is the simplest alkane that is optically active?

Q.28 In the following reaction, X is an intermediate and Y is one of the end products.

Q.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.

Q.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.

SECTION - B
MULTIPLE SELECT QUESTIONS (MSQ)

Q. 31 – Q. 40 carry two marks each.
Q.31 Which of the following is(are) auxins?

Q.32 Which of the following is(are) TRUE about photosynthesis?

Q.33 Which of the following is(are) involved in the activation of cytotoxic T cells?

Q.34 DNA and RNA are acidic in nature due to the presence of

Q.35 Which of the following is(are) CORRECT?

Q.36 Protozoa are

Q.37 Which of the following curve/straight line equations will pass through the origin when
plotted on a graph?

Q.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?

Q.39 Which of the following is(are) CORRECT?

Q.40 Which of the following gas(es) function(s) as signaling molecule(s) in the human nervous
system?

SECTION – C
NUMERICAL ANSWER TYPE (NAT)

Q. 41 – Q. 50 carry one mark each.
Q.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 ________.

Q.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 ________

Q.47 The volume (in mL) required to prepare 350 mL of 1X buffer solution from a fifty times
(50X) concentrated buffer stock solution is ________.

Q.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 ________.

Q.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 ________.

Q. 51 – Q. 60 carry two marks each.
Q.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 ________.

Q.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 2D 35Cl is ________.

Q.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 ________.

Q.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 x 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 ______.

Q.57 One point charge (q) each, is placed along a line at 3 different points x = 0, x = 2 nm and x = 6 nm. The force between two charges separated by 2 nm is 2 piconewton (pN). The magnitude of force (in pN) on the charge in the middle due to the other two charges is ________.

Q.58 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 ________.

Q.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 __________.

Leave a Comment