Microbiology MCQ – 02
1. Glucans, Mannans and Chitin are found to be present in the cell wall of ______
a. Plants
b. Eubacteria
c. Fungi
d. Actinomycetes
2. _____ is a synthetic Antimicrobial drug against Mycobacterium tuberculosis.
a. Penicillin
b. Tetracycline
c. Erythromycin
d. Isoniazid
3. Who isolated Streptococcus pneumonia for the first time?
a. Robert Koch
b. Edward Jenner
c. Antony von Leewenhock
d. Louis Pasteur
4. Botulinum toxin is a ________.
a. Protein
b. Lipid
c. Sugar
d. Nucleic acid
5. Tear drops are rich in ___________.
a. Amylase
b. Phosphatase
c. Lysozyme
d. Protease
6. Ring worm is a disease caused by
a. Fungus
b. Bacteria
c. Tape worm
d. Round worm
7. Microbes which are capable of growing over a wide range of temperature are called.
a. Stenothermal
b. Thermotolerant
c. Thermophilic
d. Eurythermal
8. Leather is made from __________ of the skin
a. Dermis
b. Both dermis and epidermis
c. Dermis and subcutaneous fatty tissue
d. None
9. Fragmentation of filamentous cyanobacteria generates small filaments called ________ that help in reproduction.
a. Trichomes
b. Hormogonia
c. Hetercysts
d. Akinetes
10. Hopanoids in prokaryotes are the equivalents of _______ in eukaryotes.
a. Steroids
b. Hormones
c. Antibiotics
d. Cholesterol
11. Proof reading is done by __________ subunit of E. coli DNA polymerase III
a. α subunit
b. ε subunit
c. chi subunit
d. tau subunit
12. ______ type of sigma factor is involved in the expression of housekeeping genes in E. coli.
a. σ ^70
b. σ ^54
c. σ ^48
d. σ ^32
13. Carbohydrates binding proteins are called______.
a. Glycoproteins
b. Lectins
c. Alexins
d. Polysacch-proteins
14. Mucopeptide is a component of cell wall in ______
a. Brown algae
b. Red algae
c. Green algae
d. Blue green algae
15. Light yellowish colour seen in Cow’s milk is due to the presence of _________.
a. Carotene
b. Curcumin
c. Cyanophycin
d. Ribofavin
Answer Key and Explanations
1. Ans. (c). Fungi
2. Ans. (d). Isoniazid
Isoniazid inhibits the mycolic acids synthesis in Mycobacterium tuberculosis. Mycolic acid is an essential component in the cell wall of Mycobacterium.
3. Ans. (d). Louis Pasteur
4. Ans. (a). Protein
Botulinum toxin is a protenaceous neurotoxin produced by Clostridium botulinum.
5. Ans. (c). Lysozyme
Lysozyme is an enzyme which degrade bacterial cell walls by catalyzing hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan.
6. Ans. (a). Fungus
7. Ans. (d). Eurythermal
Stenothermal: can survive very narrow range of temperature
Thermotolerant: can tolerate high temperature
Thermophilic: Prefer high range of temperature, most of them are from Archaebacteria.
Eurythermal: organisms able to tolerate a wide range of temperature
8. Ans. (c). Dermis and subcutaneous fatty tissue
9. Ans. (c). Hormogonia
10. Ans. (d). Cholesterol
11. Ans. (b). ε subunit
12. Ans. (a). σ ^70
13. Ans. (b). Lectins
14. Ans. (d). Blue green algae
15. Ans. (a). Carotene