Microbiology in Biotechnology MCQs

Question 1

Match the industrial products mentioned in Group I with their producer organisms in Group II. Group I Group II P. Citric acid 1. Trichoderma viride Q. Cellulase 2. Clostridium acetobutylicum R. Vitamin B12 3. Aspergillus niger S. Butanol 4. Propionibacterium freudenreichii

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 2

Match items in Group I with Group II. Group I Group II P. Alzheimer's disease 1. HINI Q. Mad cow disease 2. Hemoglobin R. Sickle cell anemia 3. Prions S. Swine flu 4. Amyloid

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 3

Which one of the following is correct about microbial growth medium?

Accepted Answer

Trypticase soy agar is a complex medium

Answer

Luria-Bertani broth is a synthetic medium

Answer

Nutrient broth is a defined medium

Answer

Sabouraud dextrose agar is a differential medium

Question 4

Which of the following statements are correct? P. Viruses can play a role in causing human cancer. Q. A tumor suppressor gene can be turned off without any change in its DNA sequence. R. Alteration in miRNA expression levels contributes to the development of cancer.

Accepted Answer

P, Q and R

Answer

P and Q only

Answer

Q and R only

Answer

P and R only

Question 5

Determine the correctness or otherwise of the following Assertion (A) and Reason (R). Assertion: Gram negative bacteria show staining with safranin. Reason: Gram negative bacteria have an outer membrane with lipopolysaccharides.

Accepted Answer

Both (A) and (R) are true and (R) is the correct reason for (A)

Answer

Both (A) and (R) are true but (R) is not the correct reason for (A)

Answer

Both (A) and (R) are false

Answer

(A) is true but (R) is false

Question 6

Match the organisms in Group I with the characteristics in Group II. Group I Group II P. Methanococcus 1. Halophile Q. Dunaliella 2. Acidophile R. Sulfolobus 3. Mesophile S. Escherichia 4. Barophile

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 7

Match the microorganisms in Group I with their fermentation products in Group II. Group I Group II P. Leuconostoc mesenteroides 1. Cobalamin Q. Rhizopus oryzae 2. Sorbose R. Gluconobacter suboxydans 3. Dextran S. Streptomyces olivaceus 4. Lactic acid 5. Butanol

Accepted Answer

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

Answer

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

Answer

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

Answer

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

Question 8

Diphtheria toxin, tetracycline and streptomycin inhibit

Accepted Answer

Translation

Answer

DNA repair

Answer

DNA replication

Answer

Transcription

Question 9

Under stress conditions bacteria accumulate

Accepted Answer

pppGpp (Guanosine pentaphosphate)

Answer

ppGpp (Goanosine tetraphosphate)

Answer

Both ppGpp and pppGpp

Answer

Either ppGpp or pppGpp