Biotechnology
GATE BT year:2020 PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–20 of 65. Imported answers require independent review unless marked reviewed.
Question 1
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Protein P becomes functional upon phosphorylation of a serine residue. Replacing this serine with __________ will result in a phosphomimic mutant of P.
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Ras protein is a
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Which of the following statements are CORRECT?
[P] Viruses can play a role in causing human cancer
[Q] A tumor suppressor gene can be turned off without any change in its DNA sequence
[R] Alteration in miRNA expression levels contributes to the development of cancer
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Which class of antibody is first made by developing B cells inside bone marrow?
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Determine the correctness or otherwise of the following Assertion [a] and the Reason [r] regarding mammalian cells.
Assertion [a]: Cells use Ca²⁺, and not Na⁺, for cell-to-cell signaling
Reason [r]: In the cytosol, concentration of Na⁺ is lower than that of Ca²⁺
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Vincristine and vinblastine, two commercially important secondary metabolites from Catharanthus roseus, are examples of
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DNA synthesized from an RNA template is called
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Two monomeric His-tagged proteins of identical molecular weight are present in a solution. pIs of these two proteins are 5.6 and 6.8. Which one of the following techniques can be used to separate them?
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During a positive-negative selection process, transformed animal cells expressing __________ are killed in presence of ganciclovir in the medium.
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A vector derived from which one of the following viruses is used for high-frequency genomic integration of a transgene in animal cells?
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