Microbiology Mock Test 8

10%

Question 1 of 10

1. Which of the following enzymes cut the DNA molecule at a particular nucleotide sequence?

ligase

restriction endonuclease

polymerase

exonuclease

Question 1 of 10

Question 2 of 10

2. Which of the following enzyme is used in the process of bating?

amylase

pectinase

invertase

protease

Question 2 of 10

Question 3 of 10

3. The temperatures used for canning foods ranges from ____________________

0-20 degree C

20-60 degree C

100-121 degree C

60-100 degree C

Question 3 of 10

Question 4 of 10

4. Jellies and jams are rarely affected by bacterial action.

False

True

Question 4 of 10

Question 5 of 10

5. Which of the following gases are produced in large amounts during sludge digestion?

hydrogen

methane

carbon-dioxide

nitrogen

Question 5 of 10

Question 6 of 10

6. The replacement of a purine by a pyrimidine or vice versa is known as ____________

transition

missense mutation

tranversion

base-pair substitution

Question 6 of 10

Question 7 of 10

7. Phosphatase enzyme present in milk is destroyed in which of the following processes?

Canning

Sterilization

Pasteurization

Dehydration

Question 7 of 10

Question 8 of 10

8. Which of the following microorganism produces dextran?

Bacillus thuringiensis

Leuconostoc mesenteroides

Streptomyces olivaceus

Bacillus polymyxa

Question 8 of 10

Question 9 of 10

9. Solvents and enzymes are found in which of the following categories of microbial products?

Food supplements

Pharmaceutical chemicals

Alcoholic beverages

Commercially valuable chemicals

Question 9 of 10

Question 10 of 10

10. Which among the following group of microorganisms are found in the ducts of cow’s mammary glands?

Lactobacilli

Micrococci

Microbacteria

Coliforms

Question 10 of 10