GATE XL branch:xl PYQs & Answers — Page 44

Questions 431–440 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 44 of 124

The frequencies for autosomal alleles A and a are p = 0.5 and q = 0.5, respectively, where A is dominant over a. Under the assumption of random mating, the mating frequency among dominant parents is ________. (Rounded off to two decimal places)

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Monkey pox is caused by a

Your answerChoose one option.

double-stranded DNA virus

single-stranded DNA virus

double-stranded RNA virus

single-stranded RNA virus

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Which one of the following converts sulfate to hydrogen sulfide?

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Beggiatoa

Desulfovibrio

Thiobacillus

Thiothrix

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Which one of the statements about bacterial flagella is correct?

Your answerChoose one option.

Flagella varies in length ranging from 0.5 to 2

Flagella are adjacent fibrils with regular patterns.

Flagella helps in conjugation.

Flagella originates from basal body.

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Microbial plastics are made from

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polyhydroxyalkanoates

polystyrene

polyurethane

polyvinyl chloride

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The correct sequence of metabolic intermediates in Krebs cycle is

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α-ketoglutarate → fumarate → succinate → malate

fumarate → malate → succinate → α-ketoglutarate

α-ketoglutarate → succinate → fumarate → malate

succinate → α-ketoglutarate → malate → fumarate

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Catabolite repression in bacteria is regulated by the concentration of

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amino acids

glucose

messenger RNA

lactose

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Phagocytosis was first described by

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Elie Metchnikoff

Robert Hooke

Robert Koch

Paul Ehrlich

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Which one of the following statements about batch culture of microbes is NOT correct?

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Cells from stationary phase will show longer lag phase when inoculated in fresh growth medium compared to those collected from exponential phase.

Death phase of culture is often exponential in nature.

Stationary phase is the critic growth phase.

The rate of generation of new cells during exponential growth phase is constant.

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Match the test in Group I with its application in Group II

Group I

P. Oakley-Fulthorpe test

Q. Limulus amoebocyte lysate test

R. Weil-Felix reaction test

S. Complement-fixation test

Group II

IgM detection

Determining antigen-antibody specificity

Endotoxin detection

Rickettsial infection diagnosis

Your answerChoose one option.

P-2, Q-3, R-4, S-1

P-2, Q-1, R-4, S-3

P-3, Q-1, R-2, S-4

P-4, Q-3, R-2, S-1

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GATE XL branch:xl PYQs

Question 65

Question 66

Question 67

Question 68

Question 69

Question 70

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Question 74