GATE BT topic:life-sciences PYQs & Answers — Page 51

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topic:life-sciences

Questions 501–510 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 51 of 65

Which one of the following covalent linkages exists between 7-Methyl guanosine (m⁷G) and mRNAs?

Your answerChoose one option.

2′–3′ triphosphate

3′–5′ triphosphate

5′–5′ triphosphate

2′–5′ triphosphate

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Which one of the following amino acid residues will destabilize an α-helix when inserted in the middle of the helix?

Your answerChoose one option.

Pro

Val

Ile

Leu

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What is the solution of the differential equation

, with the initial condition, at

Your answerChoose one option.

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The Laplace transform of the function

Your answerChoose one option.

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Which of the following factors can influence the lag phase of a microbial culture in a batch fermenter?

P. Inoculum size Q. Inoculum age R. Medium composition

Your answerChoose one option.

P and Q only

Q and R only

P and R only

P, Q and R

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Which one of the following statements is CORRECT about proportional controllers?

Your answerChoose one option.

The initial change in control output signal is relatively slow

The initial corrective action is greater for larger error

They have no offset

There is no corrective action if the error is a constant

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Match the instruments in Group I with the corresponding measurements in Group II.

Group I P. Manometer Q. Rotameter R. Tachometer S. Haemocytometer

Group II

Agitator speed

Pressure difference

Cell number

Air flow rate

Your answerChoose one option.

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

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

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

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

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Which of the following statements is ALWAYS CORRECT about an ideal chemostat? P. Substrate concentration inside the chemostat is equal to that in the exit stream Q. Optimal dilution rate is lower than critical dilution rate R. Biomass concentration increases with increase in dilution rate S. Cell recirculation facilitates operation beyond critical dilution rate

Your answerChoose one option.

P and Q only

P, R and S only

P and S only

P, Q and S only

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Determine the correctness or otherwise of the following Assertion [a] and the Reason [r] Assertion [a]: It is possible to regenerate a whole plant from a single plant cell. Reason [r]: It is easier to introduce transgenes in plants than animals.

Your answerChoose one option.

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

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A UV-visible spectrophotometer has a minimum detectable absorbance of 0.02. The minimum concentration of a protein sample that can be measured reliably in this instrument with a cuvette of 1 cm path length is ______ μM. The molar extinction coefficient of the protein is 10,000 L mol⁻¹ cm⁻¹.

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GATE BT topic:life-sciences PYQs

Question 36

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Question 45