GATE BT topic:biology PYQs & Answers — Page 56

Questions 551–560 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 56 of 65

The determinant of the matrix

is ________

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The variable

has a standard normal distribution. If

, then

is equal to (up to two decimal places) ________

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The absorbance of a solution of tryptophan measured at 280 nm in a cuvette of 2.0 cm path length is 0.56 at pH 7. The molar extinction coefficient (ε) for tryptophan at 280 nm is 5600 M⁻¹cm⁻¹ at pH 7. The concentration of tryptophan (in μM) in the solution is ________

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A single stem cell undergoes 10 asymmetric cell divisions. The number of stem cells at the end is ________

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Genomic DNA isolated from a bacterium was digested with a restriction enzyme that recognizes a 6-base pair (bp) sequence. Assuming random distribution of bases, the average length (in bp) of the fragments generated is ________

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In leguminous plants, both the rhizobium genes and the plant genes influence nodulation and nitrogen fixation. Which one of the following functions is NOT encoded by the host plant genes?

Your answerChoose one option.

Production of inducers that modify rhizobial cell wall

Production of flavonoid inducers

Establishment of contact between bacteria and legume

Root hair curling

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Which of the following cytokines are endogenous pyrogens?

P. Tumor necrosis factor-α Q. Interleukin-1 R. Transforming growth factor-β S. Interleukin-10

Your answerChoose one option.

P and Q only

P and R only

R and S only

Q and S only

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Match the classes of RNA molecules in Group I with their functions in Group II.

Group I P. snoRNA Q. piRNA R. miRNA S. snRNA

Group II

Protects germline from transposable elements

Blocks translation of selected mRNA

Template for telomere elongation

Modification and processing of rRNA

Splicing of RNA transcripts

Your answerChoose one option.

P-3, Q-5, R-2, S-4

P-1, Q-3, R-2, S-5

P-1, Q-4, R-5, S-2

P-4, Q-1, R-2, S-5

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Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]

Assertion: Ab initio gene finding algorithms that predict protein coding genes in eukaryotic genomes are not completely accurate.

Reason: Eukaryotic splice sites are difficult to predict.

Your answerChoose one option.

Both [a] and [r] are false

[a] is true but [r] is false

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]

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Which one of the following amino acids is catalyzed by activated macrophages to produce reactive nitrogen species?

Your answerChoose one option.

Arginine

Asparagine

Cysteine

Histidine

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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