MCQ on Microbial Fermentation

 1. The word fermentation is used in biochemistry Microbial technology to denote different phenomena. If the former is called C and the latter is called T. Which of the following statement is true?

a) All C is T but all T is not C

b) All Tis C but C is not T

c) T is always a product ot Genetic engineering while C is not

d) Cis always an aerobic process, while T can be aerobic or anaerobic


2. Which of the following microbial fermentations are anaerobic?

a) Ethanol and acetone-butanol

b) Citric acid and propionic acid

c) Penicillin and vitamin Bi2

d) Streptomycin and rifampicin


3. During the production of alcohol by fermentation using budding yeast, oxygen supply is kept limited. Why?

MCQ on  Microbial Fermentation

a) Budding yeasts are obligate anaerobes and cannot tolerate oxygen.

b) Budding yeasts lose mitochondria in the absence of Oxygen.

c) Budding yeasts are facultative anaerobes

d) Alcohol is oxidized further in the presence of oxygen.


4. Novel groups of polyketides can be synthesized in Actinomycetes by

a) gene rearrangement.

b) gene amplification.

c) combinatorial biosynthesis.

d) metabolic engineering.


5. Coliforms are used as indicator organisms of sewage pollution because they

a) are pathogens.

b) ferment lactose.

c) are abundant in human intestines.

d) grow within 24 hours.


6. Enzymes are nowadays used extensively in bioprocessing industries.

Enzymes 1 is used for the treatment of hides to provide a finer texture, in leather processing and the manufacture of glue.

Enzyme 2 is used for clarification of fruit juices.

identify Enzymes 1  and 2

Enzyme 1          Enzyme 2

a) Amylase     Pectinase

b) Protease    Amylase

c) Protease    Pectinase

d) Pectinase   Amylase


7. The following table lists some of the enzymes of fungi and bacteria having wide variety of industrial applications, including alcoholic beverages, food, detergents and pharmaceuticals, along with their microbial original

Enzyme                 Microorganism

A. Amylase          E. Azotobacter vinelandii

B. Asparginase   F. Serratia marcescens

C. Lipase             G. Aspergillus aureus

D. Pectinase      H.Aspergillus oryzae


The correct combinations are

(1) A and H

(2) B and G

(3) C and E

(4)  D and F


8. Industrial products in which bacteria are employed for production are shown in the following table:

I. List of products    II. Microorganims

A. 2,3-Butane diol  i) Leuconostoc

B. Dextran               ii) Brevibacterium

C. Glutamic acid    iii) Bacillus polymyxa

D. Cobalamine      iv) Propionibacterium


The correct combinations are

(1) A-ii; B-i; C-i; D - iv

(2) A-i;B-i; C-i; D - iv

(3) A -ii; B-ii; C- iv; D-i

(4) A- i; B- ii; C- iv; D-i


9. Electrons are transferred from reduced c enzymes like NADH, NADPH to pyruvic acid their derivatives during fermentation. Those final electron acceptors are reduced to the end product for example lactic acid, propionic acid, etc. end products depend on the particular microorganisms and the substrate

The organism                     End product (s)

A. Streptococcus       a. Butanediol, formic acid

B. Clostridium            b. Lactic acid

C. Salmonella             c. Butyric acid and iso propanol

D. Enterobacter         d. Succinic acid, acetic acid

The correct match is

1) A-a, B-b, C-c, D-d

2) A-d, B-c, C-a, D-c

3) A-b, B- c, C-d, D-a

4) A-c, B-d, C-a, D-b


Learn more: Topic-wise Microbiology MCQ

1. a) All C is T but all T is not C

2. a) Ethanol and acetone-butanol

3. c) Budding yeasts are facultative anaerobes

4. c) combinatorial biosynthesis.

5. c) are abundant in human intestines.

6. c) Protease    Pectinase

7. A and H

8. (1) A-ii; B-i; C-i; D - iv

9. 3) A-b, B- c, C-d, D-a

Post a Comment

We love to hear from you ! Leave us a comment.


If you find any mistake please let us know..

Happy Learning...

Previous Post Next Post