Explore topic-wise MCQs in Microbiology.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the colour of the plaque formed?

A. yellow
B. opaque
C. clear
D. blue
Answer» D. blue
Discussion
2.

What is the colour of the plaque formed?
A. yellow
B. opaque
C. clear
D. blue
Answer» D. blue
Discussion
3.

In the growth curve of plaque-forming units, the time from infection until lysis is known as ____________________

A. eclipse period
B. rise period
C. burst period
D. latent period
Answer» E.
Discussion
4.

Which of the following enzymes transcribe late genes?

A. ligases
B. nucleases
C. RNA polymerase
D. restriction enzymes
Answer» D. restriction enzymes
Discussion
5.

The delayed early genes codes for which of the following enzymes?

A. phage enzymes
B. RNA polymerase
C. nucleases
D. oxidases
Answer» B. RNA polymerase
Discussion
6.

The protein coat of the virus remains outside the host cell.

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

Which of the following is the correct sequence of events in replication by bacterial phage?

A. adsorption,pinning,DNA injection,sheath contraction
B. adsorption,pinning,sheath contraction,DNA injection
C. adsorption,absorption,sheath contraction,pinning
D. absorption,adsorption,DNA injection
Answer» C. adsorption,absorption,sheath contraction,pinning
Discussion
8.

At what temperature incubation is required for the adsorption of phage T4 and DNA injection into E.coli?

A. 50 degree C
B. 15 degree C
C. 37 degree C
D. 80 degree C
Answer» D. 80 degree C
Discussion
9.

Which of the following is the first step in replication by bacterial phages?

A. adsorption
B. penetration
C. transcription
D. assembly and release
Answer» B. penetration
Discussion