List of top Life Science Questions on Microbiology

The process of conversion of nitrogen into ammonia by bacteria is called:

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

Choose the correct answer from the options given below:

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

Benzoic acid or benzoates are used to preserve food from
A. Insects
B. Yeast
C. Clostridia
D. Molds
Choose the correct answer from the options given below:

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
Choose the correct answer from the options given below:

Organisms belongs to the genus bacteroides are:

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

Choose the correct answer from the options given below:

Which one of the given statement is not correct about plant viruses ?

Hepatitis C virus can cause liver cancer. It has:

Match LIST-I with LIST-II

Choose the correct answer from the options given below:

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

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
Choose the correct answer from the options given below:

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

Choose the correct answer from the options given below:

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:

Yellow fever is caused due to the human-to-human transmission by-