GATE BT format:nat PYQs & Answers

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–10 of 201. Imported answers require independent review unless marked reviewed.

Topic practice 201 questionsPage 1 of 21

The mean of the following series is _____. (rounded off to three decimal places)

0.01, 0.02, 0.03, ⋯ ⋯ ⋯, 1

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You are characterizing a new enzyme isolated and purified in the laboratory. If the maximum velocity of the enzyme is 1800 μmoles L⁻¹ min⁻¹ and the total concentration of the enzyme in the reaction mixture is 1.5 μM, then the turnover number of the enzyme is _____ s⁻¹. (answer in integer)

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To determine the viable cell count of a bacterial culture, you have plated 50 μL of a 100-fold diluted sample of the culture on a nutrient agar plate and obtained 20 colonies after overnight incubation. The viable cell count of the culture is _____ CFU mL⁻¹. (answer in integer)

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Given below is the Gibbs free energy change (ΔG) in kilo Joules per electron equivalent (kJ e⁻eq⁻¹) at pH 7.0, of organic and inorganic half reactions.

Acetate synthesis:

ΔG=27.4 kJ e⁻eq⁻¹

Reduction reaction:

ΔG = -78.72 kJ e⁻eq⁻¹

The free energy change of acetate oxidation to CO₂, H₂O and HCO₃⁻ is _____ kJ e⁻eq⁻¹. (rounded off to two decimal places)

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You have purified an enzyme using a series of chromatographic methods. It was observed that a 10 μg mL⁻¹ of this purified enzyme converted 10 mM substrate per hour at 25°C and pH 7. Its specific activity is _____ IU μg⁻¹. (rounded off to three decimal places)

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Consider the equation

. The value of the integral

using trapezoidal method and interval

is ________. (rounded off to two decimal places)

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If the straight lines given by the following two equations are parallel to each other, the value of a is _____. (answer in integer)

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A straight line

intersects a circle with center at

and radius of magnitude 1 at two points. The length of the chord formed by this intersection is ______. (rounded off to three decimal places)

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A heat exchanger during operation in a bioprocess has a steady temperature of 90 °C. After completion of its operation, it was shut down and it was observed that the rate of decrease of temperature at any time was directly proportional to the difference

°C, where

denotes temperature at time

. It was observed that it took 30 min for the temperature to drop to 70 °C. The temperature after 51.5 min will be ________ °C. (rounded off to the nearest integer)

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A microbial culture (follow Monod model for growth) has a maximum specific growth rate of 0.1 h

, Monod constant of 1 mg L

and endogenous decay rate of 0.1 day

. At limiting substrate concentration of 23 g L

, the net specific growth rate will be ________ day

. (rounded off to one decimal place)

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GATE BT format:nat PYQs

How to practice format:nat

Question 31

Question 32

Question 33

Question 34

Question 35

Question 51

Question 52

Question 53

Question 54

Question 55