GATE BT topic:biology PYQs & Answers — Page 29

Questions 281–290 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 29 of 65

In animal cells, the endogenously produced miRNAs silence gene expression by

Your answerChoose one option.

base pairing with the 3'-untranslated region of specific mRNAs

blocking mRNA synthesis

binding to the operator site

base pairing with the 3' region of specific rRNAs

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Terpenoids are made of __________ units

Your answerChoose one option.

amino acid

carbohydrate

isoprene

triacylglycerol

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Match the microbial product (Column I) with its respective application (Column II).

Column I: P. Methane Q. Glycolipids R. Polyhydroxy alkanoate

Column II:

Biosurfactant

Bioplastic

Biofuel

Your answerChoose one option.

P-1, Q-2, R-3

P-2, Q-1, R-3

P-3, Q-2, R-1

P-3, Q-1, R-2

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Which of the following is NOT used for generating an optimal alignment of two nucleotide sequences?

Your answerChoose one option.

Gap penalties

Match scores

Mismatch scores

Nucleotide composition

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The recognition sequences of four Type-II restriction enzymes (RE) are given below. The symbol (↓) indicates the cleavage site. Identify the RE that generates sticky ends.

Your answerChoose one option.

RE1 - 5′ G↓ATCC 3′

RE2 - 5′ TG↓CAG 3′

RE3 - 5′ CC↓GG 3′

RE4 - 5′ AG↓CT 3′

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Among individuals in a human population, minor variations exist in nucleotide sequences of chromosomes. These variations can lead to gain or loss of sites for specific restriction enzymes. Which of the following technique is used to identify such variations?

Your answerChoose one option.

Polymerase dependent fragment insertion

Real-time polymerase chain reaction

Restriction fragment length polymorphism

Reverse transcriptase polymerase chain reaction

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Assuming independent assortment and no recombination, the number of different combinations of maternal and paternal chromosomes in gametes of an organism with a diploid number of 12 is ________________.

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A microorganism is grown in a batch culture using glucose as a carbon source. The apparent growth yield is 0.5

. The initial concentrations of biomass and substrate are 2 g L

and 200 g L

, respectively. Assuming that there is no endogenous metabolism, the maximum biomass concentration that can be achieved is ________________ g L

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The degree of reduction of lactic acid (C

) is ________________.

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Consider a nonlinear algebraic equation,

. Using the Newton-Raphson method, with the initial guess of

, the value of

after one iteration (rounded off to one decimal place) is ________________.

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GATE BT topic:biology PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30