Explore topic-wise MCQs in Biology.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

Streptomyces is an antibiotic obtained from actinomycetes.

A. True
B. False
Answer» B. False
Discussion
2.

For which of the following purpose, antibiotics are not used?

A. For killing essential bacteria
B. As medicines
C. As preservatives
D. As feed supplements
Answer» B. As medicines
Discussion
3.

Which of the following is a common antibiotic obtained from lichens?

A. Usnic acid
B. Penicillin
C. Cephalosporium
D. Clavacin
Answer» B. Penicillin
Discussion
4.

From which of the following species an antibiotic is generally not obtained?

A. Lichens
B. Fungi
C. Actinomycetes
D. Archaebacteria
Answer» E.
Discussion
5.

Which of the following may be a reason for the development of resistance to antibiotics?

A. Mutation in the pathogen
B. Very effective antibiotic
C. Very weak pathogen
D. Can never happen
Answer» B. Very effective antibiotic
Discussion
6.

Which of the following is not the characteristic of a good antibiotic?

A. Harmless to host
B. Ability to destroy the pathogen
C. Ability to destroy all the microflora in the alimentary canal of the host
D. Effective against all strains of pathogens
Answer» D. Effective against all strains of pathogens
Discussion
7.

Which of the following is not a method by which antibiotic functions?

A. Disruption of wall synthesis
B. Inhibition of 50S ribosome
C. Inhibition of DNA synthesis
D. Permitting the growth of bacteria
Answer» E.
Discussion
8.

Broad-spectrum antibiotics can kill only a small number of pathogens.

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

Who was the first person to discover an antibiotic?

A. Rene Dubois
B. Alexander Fleming
C. Waksman
D. Louis Pasteur
Answer» C. Waksman
Discussion
10.

Who coined the term antibiotics?

A. Waksman
B. Pasteur
C. Babes
D. Albert
Answer» B. Pasteur
Discussion