Explore topic-wise MCQs in Molecular Biology.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Molecular Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

The –10 promoter region is rich in ______________ bases.

A. A, G
B. C, T
C. A, T
D. C, G
Answer» D. C, G
Discussion
2.

Negative supercoiling enhances the rate of transcription.

A. True
B. False
Answer» B. False
Discussion
3.

–10, – 35 and +1 sites are the consensus promoter sites of sigma factor ______________

A. σ70
B. σ32
C. σ54
D. σ28
Answer» B. σ32
Discussion
4.

The –35 sequence is highly conserved and has a consensus sequence of ___________

A. TGACAA
B. TCGAA
C. TGCAAC
D. TTGACA
Answer» E.
Discussion
5.

THE_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬®10_PROMOTER_REGION_IS_RICH_IN________________BASES.?$#

A. A, G
B. C, T
C. A, T
D. C, G
Answer» D. C, G
Discussion
6.

Negative supercoiling enhances the rate of transcription?

A. True
B. False
Answer» B. False
Discussion
7.

The complex formed by the polymerase and the promoter DNA is known as the _____________

A. λ complex
B. γ complex
C. Open complex
D. Closed complex
Answer» E.
Discussion
8.

The RNA polymerase core enzyme has a high specificity for promoter sites and can perfectly work alone.

A. True
B. False
Answer» C.
Discussion
9.

–10, – 35 and +1 sites are the consensus promoter sites of sigma factor ______________$

A. σ70
B. σ32
C. σ54
D. σ28
Answer» B. ‚âà√¨‚àö√¢32
Discussion
10.

The +1 site of conserved promoter sequence is generally a pyrimidine.

A. True
B. False
Answer» C.
Discussion
11.

The –35 sequence is highly conserved and has a consensus sequence of ___________$

A. TGACAA
B. TCGAA
C. TGCAAC
D. TTGACA
Answer» E.
Discussion
12.

The Pribnow box is present on the coding strand of the DNA template.

A. True
B. False
Answer» C.
Discussion
13.

What is the consensus sequence of the Pribnow box?

A. TATATA
B. TATAAT
C. TAATA
D. TTAAT
Answer» C. TAATA
Discussion