Biotechnology
GATE BT 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
Open questionBTMSQ2 marksNeeds review
Methylation of CpG islands near the promoter of a gene can inhibit transcription by
Your answerSelect all correct options. You can choose more than one.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 55
Open questionBTNAT2 marksNeeds review
DNA sample collected from an unidentified bacterial species (Y) contains 13% of adenine. The G+C content (in percentage) of Y is __________.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 56
Open questionBTNAT2 marksNeeds review
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
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 21
Open questionBTMCQ1 markNeeds review
In animal cells, the endogenously produced miRNAs silence gene expression by
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 46
Open questionBTMCQ2 marksNeeds review
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
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 51
Open questionBTMSQ2 marksNeeds review
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?
Your answerSelect all correct options. You can choose more than one.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 2
Open questionBTMCQ1 markNeeds review
The enzyme that transcribes the eukaryotic genes encoding precursor ribosomal RNAs (pre-rRNAs) of 28S, 18S and 5.8S rRNAs is
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 17
Open questionBTMCQ1 markNeeds review
The cellular process which utilizes RNA-induced silencing complex to block gene expression is
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 3
Open questionBTMCQ1 markNeeds review
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
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 7
Open questionBTMCQ1 markNeeds review
DNA synthesized from an RNA template is called
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer