List of top Life Science Questions on Microbiology asked in CUET (PG)

Which of the following statements are True?
A. Tetracycline inhibits protein synthesis through interference with the binding of aminoacyl-tR to 30S subunit of ribosome
B. Chloramphenicol inhibits protein synthesis by combining with the 50S subunit of ribosome
C. Erythromycin inhibits protein synthesis by binding on the 30S subunit of ribosome
D. Streptomycin inhibits protein synthesis by combining with 30S subunit of ribosome

Select the correct order of steps involved in Nitrogen fixation by microbes:
A. Nitrification
B. Denitrification
C. Organic nitrogen degradation
D. Ammonification
E. Nitrite- formation

Select the correct order of the steps involved in Gram staining:
A. Counter staining
B. Crystal violet- Iodine (CV-I)
C. Heat Fixation
D. Decolorizing agent

Lithotroph is an organism that uses:

Agar is used for preparing solid media for culture. Which of the following is not true about agar media?

The Bdellovibrios bacteria is a _________ bacteria:
A. Gram negative
B. Predator of gram negative bacteria
C. It has a single polar flagellum
D. Reproduce by producing spores called myxospore during nutrient deficit conditions
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Organisms belongs to the genus bacteroides are:

Tetracycline is usually mixed with the culturing medium as selective agents in selecting transformants in gene cloning technique. It acts by:

A method for culturing anaerobes is the GasPak System, which uses hydrogen and a ___________ catalyst to remove O\(_2\).

The antimicrobial agent mercuric chloride functions by

Match LIST-I with LIST-II

LIST-I (Commercial Production)		LIST-II (Microorganism)
A. Citric acid	I. Corynebacterium glutamicum
B. Ethanol	II. Aspergillus niger
C. Amino acids and nucleotides	III. Claviceps purpurea
D. Alkaloids	IV. Saccharomyces cerevisiae

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Match LIST-I with LIST-II

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Match LIST-I with LIST-II

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Benzoic acid or benzoates are used to preserve food from
A. Insects
B. Yeast
C. Clostridia
D. Molds
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Which one of the given statement is not correct about plant viruses ?

For sterilization, the culture media and glasswares must be generally autoclaved at:

Hepatitis C virus can cause liver cancer. It has:

Typhoid Vi vaccine consists of which type of product?

Which of the following is the example of Gram-negative bacteria?

Which of the following are viral diseases?
(A) Yellow fever
(B) Hepatitis B
(C) Chickenpox
(D) Rabies
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Lederberg and Tatum describe the phenomena of-

Match List I with List II:

List I	List II
(A) D’Herelle and Twort	(I) Bacterial transformation
(B) Beadle and Tatum	(II) Penicillin
(C) Fleming	(III) One-gene-one-enzyme hypothesis
(D) Griffith	(IV) Bacterial viruses

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Vaccine is not available for which disease?

Antibody formed immediately after infection is-

Arrange the steps involved in Gram-stain procedure:
(A) Staining with Crystal Violet
(B) Staining with Gram’s Iodine
(C) Decolorization
(D) Staining with Safranine
Choose the correct answer from the options given below: