Microbiology in Biotechnology MCQs

Question 1

Which one of the following is not a product of denitrification in Pseudomonas?

Accepted Answer

NH4+

Answer

N2

Answer

N2O

Answer

NO2

Question 2

Which of the following are true for Treponema pallidum? P. It is the causative agent of syphilis Q. It is a spirochete R. It is a non-motile bacterium S. It is generally susceptible to penicillin Choose the correct combination.

Accepted Answer

P, Q and S only

Answer

P, Q and R only

Answer

P, R and S only

Answer

Q, R and S only

Question 3

Match the organisms in Group I with the entries in Group II. Group I Group II P. Clostridium 1. Rods with teichoic acid in the cell wall Q. Escherichia 2. Rods with endospores R. Vibrio 3. Helical rods with flagella S. Bacillus 4. Rods with LPS in the outer membrane 5. Curved rods with polar flagella

Accepted Answer

P-2, Q-4, R-5, S-1

Answer

P-2, Q-1, R-5, S-4

Answer

P-5, Q-4, R-2, S-3

Answer

P-3, Q-2, R-1, S-4

Question 4

Which family of viruses has single stranded DNA?

Accepted Answer

Parvoviridae

Answer

Herpesviridae

Answer

Poxviridae

Answer

Retroviridae

Question 5

Phylum proteobacteria is subdivided into α, β, γ, δ and ε-proteobacteria based on

Accepted Answer

16S rRNA sequences

Answer

G + C content

Answer

23S rRNA sequences

Answer

tRNA sequences

Question 6

Which one of the following enzymes is encoded by human immunodeficiency virus (HIV) genome?

Accepted Answer

Reverse transcriptase

Answer

Phospholipase

Answer

Phosphatase

Answer

ATP synthase