GATE BT topic:biotechnology PYQs & Answers — Page 64

Questions 631–640 of 650. Imported answers require independent review unless marked reviewed.

If the chemical composition of proteins in an organism is CH₁.₅O₀.₃N₀.₃S₀.₀₀₄, the mass percentage of carbon in the proteins is ________.

Given data: Atomic weights (Da) of C = 12, H = 1, O = 16, N = 14, and S = 32.

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For the probability density

, the integral

________.

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Growth of a microbe in a test tube is modeled as

, where, X is the biomass, r is the growth rate, and K is the carrying capacity of the environment (

;

). If the value of starting biomass is

, which one of the following graphs qualitatively represents the growth dynamics?

Your answerChoose one option.

Diagram for Biotechnology question 48 (figure 2)

Diagram for Biotechnology question 48 (figure 3)

Diagram for Biotechnology question 48 (figure 4)

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A zero-order liquid phase reaction A

B is being carried out in a batch reactor with

mol/min. If the starting concentration of A is 0.1 moles/liter, the time (in minutes) taken by the system before A is exhausted in a 100 liter reactor is ________.

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The interaction energy E between two spherical particles is plotted as a function of the distance (r) between them. When

, where

is a constant, the net force between the spherical particles is repulsive. When

, they attract via van der Waals attraction. Which one of the following plots correctly represents the interaction energy between the above two particles?

Your answerChoose one option.

Diagram for Biotechnology question 50 (figure 2)

Diagram for Biotechnology question 50 (figure 3)

Diagram for Biotechnology question 50 (figure 4)

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EcoRI restriction sites on a 10kb DNA fragment are shown below.

Upon partial digestion, what are the lengths (in kb) of all the possible DNA fragments obtained?

Your answerChoose one option.

2, 3, 4, 5, 6, 7, 8, and 10

2, 3, 4, 5, 6, and 7

2, 3, 4, and 7

2 and 3

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A DNA strand of length 25 nm wraps diametrically around the circumference of a spherical histone-octamer once. The radius (nm) of the histone-octamer is ________. Given data:

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One hundred E. coli cells are each infected by a single

phage particle. The ratio of the number of phage particles committing to lysogeny to those committing to lysis is 4:1. Assuming that the average burst size is 80, the number of free phage particles released after one round of infection is ________.

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During anaerobic growth, an organism converts glucose (P) into biomass (Q), ethanol (R), acetaldehyde (S), and glycerol (T). Every mole of carbon present in glucose gets distributed among the products as follows:

1 (C-mole P)

0.14 (C-mole Q) + 0.25 (C-mole R) + 0.3 (C-mole S) + 0.31 (C-mole T)

From 1800 grams of glucose fed to the organism, the ethanol produced (in grams) is ________. Given data: Atomic weights (Da) of C = 12, H = 1, O = 16, and N = 14

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Which of the following conditions promote the development of human autoimmune disorders?

P. Inability to eliminate self-reactive lymphocytes Q. Generation of auto-antibodies R. Ability to eliminate self-reactive T-cells S. Induction of regulatory T-cells in the thymus

Your answerChoose one option.

P, R

Q, S

P, Q

R, S

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GATE BT topic:biotechnology PYQs

Question 46

Question 47

Question 48

Question 49

Question 50

Question 51

Question 52

Question 53

Question 54

Question 55