GATE BT topic:life-sciences PYQs & Answers — Page 42

Questions 411–420 of 650. Imported answers require independent review unless marked reviewed.

Which one of the following statements about Agrobacterium Ti plasmid is CORRECT?

Your answerChoose one option.

Vir genes are located within the T-DNA segment

Phytohormone biosynthesis genes are located outside the T-DNA segment

Opine catabolism genes are located within the T-DNA segment

Opine biosynthesis genes are located within the T-DNA segment

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Which of the following types of molecules act as biological catalysts? [P] Protein [Q] RNA [R] Phospholipid

Your answerChoose one option.

P and Q only

P and R only

Q and R only

P, Q and R

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Which one of the following media components is used to maintain pH in mammalian cell culture?

Your answerChoose one option.

CaCl₂

MgSO₄

NaCl

NaHCO₃

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Which of the following are energy transducing membranes? [P] Plasma membrane of bacteria [Q] Inner membrane of chloroplasts [R] Inner membrane of mitochondria

Your answerChoose one option.

P and Q only

P and R only

Q and R only

P, Q and R

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Amino acid sequences of cytochrome c and ribulose 5-phosphate epimerase from 40 organisms were chosen and phylogenetic trees were obtained for each of these two protein families.

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

Assertion [a]: The two trees will not be identical

Reason [r]: The nature and frequency of mutations in the two families are different

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 false but [r] is true.

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A microorganism isolated from a salt-rich (salt concentration ~2 M) lake was found to possess diglycerol tetraethers, with polyisoprenoid alcohol side chains, as the major lipid component of its cell membrane. The isolated organism is

Your answerChoose one option.

a planctomycete.

a cyanobacteria.

a unicellular amoeba.

an archaea.

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A function

is as follows:

The function

is a continuous function when

is equal to ____________ (answer is an integer).

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Given that

, the value of

for X = 1 and Y = 0 is ____________ (answer is an integer).

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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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Solvents A and B are completely immiscible. Solute S is soluble in both these solvents. 100 g of S was added to a container which has 2 kg each of A and B. The solute is 1.5 times more soluble in solvent A than in solvent B. The mixture was agitated thoroughly and allowed to reach equilibrium. Assuming that the solute has completely dissolved, the amount of solute in solvent A phase is ____________ g.

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GATE BT topic:life-sciences PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20