Biotechnology
GATE BT topic:molecular-biology PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–30 of 50. Imported answers require independent review unless marked reviewed.
Question 40
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Methylation of CpG islands near the promoter of a gene can inhibit transcription by
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DNA sample collected from an unidentified bacterial species (Y) contains 13% of adenine. The G+C content (in percentage) of Y is __________.
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If 100 bp of a double-helical DNA weighs 1×10
gm and distance between two bp is 0.34 nm, the total amount of DNA (in mg, rounded off to one decimal place) required to stretch from Earth to Moon (assuming the distance between Earth and Moon to be 3,74,000 km) is __________.Log in to check the answer
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In animal cells, the endogenously produced miRNAs silence gene expression by
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Adenine can undergo a spontaneous change to hypoxanthine in a cell, leading to a DNA base pair mismatch. The CORRECT combination of enzymes that are involved in repairing this damage is
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Which of the following statement(s) is(are) CORRECT regarding the lac operon in E. coli when grown in the presence of glucose and lactose?
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The enzyme that transcribes the eukaryotic genes encoding precursor ribosomal RNAs (pre-rRNAs) of 28S, 18S and 5.8S rRNAs is
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The cellular process which utilizes RNA-induced silencing complex to block gene expression is
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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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DNA synthesized from an RNA template is called
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