GATE BT Engineering principles applied to biological systems PYQs & Answers — Page 2

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Engineering principles applied to biological systems

Questions 11–20 of 21. Imported answers require independent review unless marked reviewed.

Topic practice 21 questionsPage 2 of 3

Figure below depicts simplified metabolic and transport reactions taking place in the production of B from A in a cell. The subscript ‘i’ refers to intracellular metabolites.

is the

reaction flux in

. Under pseudo-steady-state condition, the following reaction fluxes are available.

and

The transport flux of B,

, is ______________

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A feed stream (

) containing components

and

is processed in a system comprising of separation unit and a mixer as shown below in the schematic diagram. The mole fraction of the components

and

are

and

, respectively. If

, the degrees of freedom of the system is ________.

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A bacterium produces acetic acid from ethanol as per the following reaction

The thermodynamic maximum yield of acetic acid from ethanol in

(rounded off to two decimal places) is ________.

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The elemental composition of dry biomass of a yeast species is CH₁.₆O₀.₄N₀.₂S₀.₀₀₂₄P₀.₀₁₇. The contribution of carbon to the dry biomass is ____________% (round off to 2 decimal places).

[Given: atomic weights of H, C, N, O, P and S are 1, 12, 14, 16, 31 and 32, respectively]

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Which one of the following need NOT be conserved in a biochemical reaction?

Your answerChoose one option.

Total mass

Total moles

Number of atoms of each element

Total energy

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The degree of reduction for acetic acid (C₂H₄O₂) is __________.

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The mass of 1 kmol of oxygen molecules is ______ g (rounded off to the nearest integer).

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Yeast biomass (C₆H₁₀O₃N) grown on glucose is described by the stoichiometric equation given below: C₆H₁₂O₆ + 0.48 NH₃ + 3 O₂ → 0.48 C₆H₁₀O₃N + 3.12 CO₂ + 4.32 H₂O

The amount of glucose needed for the production of 50 g L⁻¹ of yeast biomass in a batch reactor with a working volume of 1,00,000 L is ______ kg (rounded off to the nearest integer).

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Yeast converts glucose to ethanol and carbon dioxide by glycolysis as per the following reaction:

Assuming complete conversion, the amount of ethanol produced (in g) from 200 g of glucose is (up to two decimal places)

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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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GATE BT Engineering principles applied to biological systems PYQs

Question 57

Question 50

Question 55

Question 19

Question 18

Question 23

Question 24

Question 51

Question 49

Question 46