Biotechnology
GATE BT year:2021 PYQs
Build your understanding with focused practice from past exam papers.
Questions 41–50 of 65. Imported answers require independent review unless marked reviewed.
Question 31
Open questionBTMCQ2 marksNeeds review
Which of the following combinations of plant hormones and their associated function are CORRECT?
Hormone Function
P. Abscisic acid Breaks seed dormancy
Q. Auxin Induces cell division
R. Ethylene Stimulates ripening of fruits
S. Gibberellin Promotes seed dormancy
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Which one of the following tools is used to compare all the possible six-open reading frames of a given nucleotide query sequence with all the available six-open reading frames of the nucleotide sequence database?
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In Neurospora crassa, a mutation in the pok gene results in a slow growth phenotype (pok). The results of four crosses are given below.
(1) wild-type ♀ × wild-type ♂ → All progeny are wild-type
(2) wild-type ♀ × pok ♂ → All progeny are wild-type
(3) pok ♀ × wild-type ♂ → All progeny are pok
(4) pok ♀ × pok ♂ → All progeny are pok
Which one of the following explains the inheritance mode of pok?
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Tertiary structure of a protein consisting of α-helices and β-strands can be determined by
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Which of the following statement(s) is/are CORRECT about Agrobacterium tumefaciens?
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Which of the following antimicrobial agent(s) is/are growth factor analog(s)?
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Which of the following chemical messenger(s) is/are derivative(s) of tryptophan?
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Which of the following nucleus/nuclei is/are NMR active?
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In a Mendel’s dihybrid experiment, a homozygous pea plant with round yellow seeds was crossed with a homozygous plant with wrinkled green seeds. F₁ intercross produced 560 F₂ progeny. The number of F₂ progeny having both dominant traits (round and yellow) is _____.
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A 0.1 mL aliquot of a bacteriophage stock having a concentration of 4×10⁹ phages mL⁻¹ is added to 0.5 mL of E. coli culture having a concentration of 2×10⁸ cells mL⁻¹. The multiplicity of infection is _____.
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