GATE XL format:mcq PYQs & Answers — Page 40

Questions 391–400 of 812. Imported answers require independent review unless marked reviewed.

Water balance in extreme halophiles such as Halobacterium is maintained by cell surface glycoproteins consisting of

Your answerChoose one option.

glycine and lysine.

lysine and histidine.

glycine.

aspartate and glutamate.

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Nocardia spp. are not amenable to the classical method of Gram staining due to the presence of

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N-acetylasaminuronic acid in the cell wall.

thick peptidoglycan.

mycolic acid.

keto-deoxy-octulosonic acid.

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Protists belonging to the genus Trichonympha thrive in the gut of termites. They help the termites use wood as a food source. This relationship is an example of

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parasitism.

competition.

commensalism.

mutualism.

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Under anaerobic fermentative growth conditions, one mole of glucose yields 22 grams of Streptococcus faecalis or 8.6 grams of Zymomonas mobilis. The molar growth yield (YATP) for (i) S. faecalis and (ii) Z. mobilis will be

Your answerChoose one option.

(i) 11 and (ii) 4.3

(i) 22 and (ii) 4.3

(i) 22 and (ii) 8.6

(i) 11 and (ii) 8.6

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The order of abundance of quinones (ubiquinone [UQ], menaquinone [MQ] and demethylmenaquinone [DMQ]) in E. coli growing anaerobically on fumarate is

Your answerChoose one option.

UQ > DMQ > MQ

MQ > DMQ > UQ

MQ = DMQ > UQ

MQ > UQ > DMQ

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What is the number of ATPs generated per molecule of NADH during oxidative phosphorylation in E. coli via (i) NDH-1 and cytochrome bo complex or (ii) the NDH-2 and cytochrome bd complex? (Assume H⁺/ATP = 3)

Your answerChoose one option.

(i) 2.00 and (ii) 3.67

(i) 3.00 and (ii) 2.67

(i) 2.70 and (ii) 0.67

(i) 2.50 and (ii) 0.50

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Match the Immunoglobulin classes with their function

Immunoglobulin Function (i) IgE (p) protects the fetus (ii) IgG (q) first antibody to be produced in response to infection (iii) IgM (r) provides localized protection of mucosal surfaces (iv) IgA (s) mediates allergic reaction (t) directly lyses the target cells

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(i)-(s), (ii)-(p), (iii)-(q), (iv)-(r)

(i)-(p), (ii)-(t), (iii)-(q), (iv)-(r)

(i)-(q), (ii)-(p), (iii)-(t), (iv)-(r)

(i)-(r), (ii)-(p), (iii)-(t), (iv)-(s)

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The figure shows the profiles of quantitative real-time PCR (qRT-PCR) tests for SARS-CoV-2 conducted on the throat swab samples of three individuals (X, Y and Z). Tests were carried out under identical conditions. Dotted line represents the threshold fluorescent value. Identify the correct statement on the status of the COVID-19 tests of the individuals based on their qRT-PCR profiles.

Your answerChoose one option.

X and Y are negative; Z is positive

X and Y are positive; There is no apparent difference in their viral load

X and Y are positive; X has the highest viral load

X and Y are positive; Y has the highest viral load

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The rate of appearance of recombinant E. coli strains containing different genes after a mating between Hfr and F⁻ strains is shown in the graph (left). The approximate location of different genes (p, q, r, s, t, x, and y) along the Hfr chromosome is also shown (right). Based on this information, identify the recombinants X, Y and Z.

Your answerChoose one option.

X is p⁺, Y is r⁺ and Z is p⁺

X is p⁺, Y is r⁺ and Z is x⁺

X is x⁺, Y is p⁺ and Z is r⁺

X is p⁺, Y is x⁺ and Z is r⁺

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Ichthyophis belongs to which of the following Class?

Your answerChoose one option.

Mammalia

Reptilia

Amphibia

Aves

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GATE XL format:mcq PYQs

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Question 1