Microbiology Mock Test

🟥 QUESTIONS : 20

🟥 TIME : 20 MINS

1 / 20

1) Which of the following bacteria reduce nitrate in soil into nitrogen ?

A) (2) Nitrobacter

B) (4) Thiobacillus

C) (3) Nitrococcus

D) (1) Nitrosomonas

2 / 20

2)

One scientist cultured Cladophora in a
suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of :
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-
-
-

A) (2) Violet and green light

B) (1) Blue and red light

C) (3) Indigo and green light

D) (4) Orange and yellow light

3 / 20

3)

Which of the following is not the function of large intestine?
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A) Temporary storage of faeces

B) Bacterial fermentation of indigestible materials

C) Reabsorption of water and minerals

D) Nutrient reabsorption

4 / 20

4) Significance of ‘heat shock’ method in bacterial transformation is to facilitate the

A) Binding of DNA to the cell wall.

B) Uptake of DNA through membrane transport proteins.

C) Uptake of DNA through transient pores in the bacterial cell wall.

D) Expression of antibiotic resistance gene.

5 / 20

5) Correct sequence of layers of bacterial cell envelope from outward to inward is

A) Cell wall --> Glycocalyx --> Cell membrane

B) Cell membrane --> Glycocalyx --> Cell wall

C) Glycocalyx --> Cell wall --> Cell membrane

D) Glycocalyx --> Cell membrane --> Cell wall

6 / 20

6) Significance of ‘heat shock’ method in bacterial transformation is to facilitate the

A) Expression of antibiotic resistance gene.

B) Binding of DNA to the cell wall.

C) Uptake of DNA through transient pores in the bacterial cell wall

D) Uptake of DNA through membrane transport proteins.

7 / 20

7) QBacteria which survive in marshy areas & also present in the gut of many ruminant animals like cows & buffalo's are

A) Halophiles

B) Basophiles

C) Thermoacidophiles

D) Methenogens

8 / 20

8) Antibiotics are mostly obtained from

A) Bacteria

B) Actinomyces

C) Cyanobacteria

D) 1 and 2

9 / 20

9) lactic acid bacteria grow in milk and convert it into curd also improve its nutritional quality by increasing

A) Vitamin A

B) Vitamin B6

C) Vitamin C and A

D) Vitamin B12

10 / 20

10)

Inclusion bodies of blue-green, purple, and green
photosynthetic bacteria are :

A) Contractile vacuoles

B) Gas vacuoles

C) Centrioles

D) Microtubules

11 / 20

11)

Which of the following is not true about chloramphenicol?
(1) It inhibits the growth of only grampositive bacteria.
(2) It is a broad spectrum antibiotic.
(3) It is not bactericidal.
(4) It is bacteriostatic.

A) 1

B) 2

C) 3

D) 4

12 / 20

12) BSE and CJD is caused by _____

A) Prions

B) Virioids

C) Bacteria

D) Virus

13 / 20

13)

Nuclear membrane is absent in
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A) Plants

B) Fungi

C) Bacteria

D) Animals

14 / 20

14)

Bacteria reproduces mainly by
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A) Spore formation

B) Fission

C) Budding

D) Conjugation

15 / 20

15) Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called

A) hybrid organisms

B) pest resistant organisms

C) insect resistant organisms

D) genetically modified organisms

16 / 20

16) Carbohydrates the most abundant biomolecules on the earth are produced by

A) Fungi,algae and green plant cells

B) All bacteria, fungi and algae

C) Some bacteria,algae and green plant cell

D) Viruses fungi and algae

17 / 20

17) While isolating DNA from bacteria, which of the following enzymes is not used ?

A) Lysozyme

B) Ribonuclease

C) Deoxyribonuclease

D) Protease

18 / 20

18)

Which of the following bacteria reduce nitrate in soil into
nitrogen ?
1. Nitrobacter
2. Thiobacillus
3. Nitrococcus
4. Nitrosomonas

A) 1

B) 2

C) 3

D) 4

19 / 20

19)

One scientist cultured Cladophora in a suspension of
Azotobacter and illuminated the culture by splitting light
through a prism. He observed that bacteria accumulated
mainly in the region of :
1. Violet and green light
2. Indigo and green light
3. Orange and yellow light
4. Blue and red light

A) 1

B) 2

C) 3

D) 4

20 / 20

20) Bacteria is considered as plants because

A) they can move

B) they are present everywhere

C) can multiply by fission

D) they have cell wall

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HSST Microbiology Mock Test

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