Explore topic-wise MCQs in Molecular Biology.

This section includes 10 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 α subunits of polymerase has a function of ____________

A. Promoter binding
B. Initiation
C. Elongation
D. Termination
Answer» B. Initiation
Discussion
2.

Which of the following statements are true about the roles of RNA polymerase subunits?

A. i, ii, iii
B. ii, iii, iv
C. i, iii, iv
D. i, ii, iii, ivView Answer
Answer» D. i, ii, iii, ivView Answer
Discussion
3.

The RNA polymerase holoenzyme has the structural formula of ___________

A. α2ββ’ωσ
B. αβ2β’ωσ
C. α2ββ’ω
D. α2ββ’σ
Answer» B. αβ2β’ωσ
Discussion
4.

The E. coli RNA polymerase adds __________ nucleotides per second.

A. 20
B. 30
C. 40
D. 50
Answer» D. 50
Discussion
5.

The eukaryotic subunit of RNA polymerase homologous to the ω subunit of bacterial RNA polymerase is ___________

A. RPA1
B. RPB2
C. RPC5
D. RPB6
Answer» E.
Discussion
6.

Which RNA polymerase deals with the production of mRNA?

A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. RNA polymerase IV
Answer» B. RNA polymerase II
Discussion
7.

Which of the following RNA polymerases are responsible for the production of 5S rRNA?

A. RNA polymerase I
B. RNA polymerase II
C. RNA polymerase III
D. RNA polymerase IV
Answer» D. RNA polymerase IV
Discussion
8.

The transcription process carried out by the RNA polymerase is very accurate but less accurate than replication.

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

RNA polymerase requires a DNA primer for RNA synthesis.

A. True
B. False
Answer» C.
Discussion
10.

How is the genetic material expressed?

A. By replication and transcription
B. By transcription and translation
C. By translation and modification
D. By mutation and transposition
Answer» C. By translation and modification
Discussion