GATE BT topic:life-sciences PYQs & Answers — Page 5

Questions 41–50 of 650. Imported answers require independent review unless marked reviewed.

For the given matrix, which of the statements given below is/are true?

Your answerSelect all correct options. You can choose more than one.

The matrix is full rank

The matrix is invertible

The matrix has a determinant

The matrix has a transpose

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Messenger RNAs (mRNAs) translate to generate polypeptides and the translation terminates at the UGA, UAG or UAA stop codons. The AGA codon acts as additional stop codon in the mitochondria. The longest possible polypeptide(s) that can be hypothetically translated in the cytosol and/or mitochondria, from the given full length mRNA sequence (36 nucleotides) is/are

5′- AACACUAGACCAUGGCGAGACGUAGUUAAA- 3′

Your answerSelect all correct options. You can choose more than one.

7 amino acids long in the cytosol

5 amino acids long in the mitochondria

6 amino acids long in the mitochondria

8 amino acids long in the cytosol

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The RNA sequence below depicts the part of a 330 nucleotides long mRNA and it encodes the C-terminal portion of a protein.

5′-… … … AAC ACC CGC CCU GUG GCG ACG UAG- 3′

A mutation was identified in this RNA, denoted as 322A→U. This nucleotide change is represented by which of the following class(es) of mutation?

Your answerSelect all correct options. You can choose more than one.

Missense mutation

Non-sense mutation

Transversion mutation

Silent mutation

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A microbial culture is being grown in a bioreactor with continuous aeration. The dissolved oxygen probe provided with the system shows a reading of zero. In this context, which of the following inferences is/are correct?

Your answerSelect all correct options. You can choose more than one.

The culture has died due to absence of oxygen

The culture has run out of carbon source

The culture growth becomes oxygen limited

The culture growth is independent of dissolved oxygen

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For a Newtonian fluid, a plot of shear stress (on Y axis) against shear rate (on X axis) will result in a straight line ________.

Your answerSelect all correct options. You can choose more than one.

parallel to the X axis

parallel to the Y axis

with a negative slope

with a positive slope

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In an aerobic fermentation with air sparging, which of the following options can be used to increase the volumetric mass transfer coefficient for oxygen transfer?

Your answerSelect all correct options. You can choose more than one.

Using pure oxygen in place of air

Increasing the volumetric flow rate of air

Reducing the bubble diameter

Decreasing the agitation rate

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For a liquid flowing in a circular cross section pipe, the transition from laminar to turbulent flow will NOT depend on which of the following factor(s)?

Your answerSelect all correct options. You can choose more than one.

The diameter of the pipe

The length of the pipe

The linear velocity of the liquid

The viscosity of the liquid

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Which of the following is/are posttranslational modification(s) involved in epigenetic control of gene expression?

Your answerSelect all correct options. You can choose more than one.

Arginine methylation

Lysine acetylation

Cytosine methylation

Cytosine deamination

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For an ideal plug flow reactor, which of the following statements is/are true?

Your answerSelect all correct options. You can choose more than one.

It can be approximated by a large number of ideal continuous stirred tank reactors connected in series

It has significant back mixing

It has significant axial mixing

It has a uniform velocity profile across any cross section

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An enzyme-catalyzed reaction is found to have

. Which of the following statements about this reaction is/are true?

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The rate of the reaction cannot be predicted

The rate of the reaction is high

The rate of the reaction is low

The reaction is irreversible

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GATE BT topic:life-sciences PYQs

Question 41

Question 42

Question 43

Question 44

Question 45

Question 46

Question 47

Question 48

Question 49

Question 50