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Question 1 of 20
Intergenic suppression involves mutation inCorrect
Question 2 of 20
Which one of the following proteins does NOT bind to a gaseous ligand?Correct
Question 3 of 20
Rheumatic fever is an example ofCorrect
Question 4 of 20
Oxygenases that catalyse the initial step in the degradation of polycyclic aromatic hydrocarbons by using molecular oxygen belong to which enzyme class?Correct
Question 5 of 20
Which one of the following is NOT involved in horizontal gene transfer?Correct
Question 6 of 20
The principle of immunization was first explained byCorrect
Question 7 of 20
Lysozyme catalyzes the breakdown ofCorrect
Question 8 of 20
Which one of the following microscopic techniques can be used to study the contour of proteins?Correct
Question 9 of 20
Match compounds in Group I with inhibitory activities in Group II.
(i) Folate metabolism
(ii) DNA synthesis
(iii) Protein synthesis
(iv) RNA synthesis
(v) Cell wall synthesisCorrect
Question 10 of 20
The length of a coding region in an mRNA is 897 bases. How many amino acids will be there in the polypeptide synthesized using this mRNA?Correct
Question 11 of 20
Match the media in Group I for screening microbial isolates in Group II.
Group I Group II
(P) Blood agar media (i) Coliforms
(Q) Minimal media (ii) Protease producers
(R) Skimmed milk agar media (iii) Hemolytic microbes
(S) Bile salt media (iv) Lipase producers
Question 12 of 20
During a bacterial growth experiment, the total viable cell count at 2 h and 6 h was 10,000 cells/ml and 1×109 (10 to the power 9) cells/ml, respectively. The specific growth rate (in per hour) of the culture isCorrect
Question 13 of 20
The concentration of sodium chloride in the cytoplasm of a Halobacterium sp. was found to be 250 ng/nl. The molarity (in M) of sodium chloride isCorrect
Question 14 of 20
Match organisms in Group I with shapes in Group II and flagellar arrangements in Group III.
Group I Group II Group III
(P) Salmonella typhi (i) helical (1) non-motile
(Q) Saccharomyces cerevisiae (ii) rod (2) amphitrichous
(R) Aquaspirillum serpens (iii) curved rod (3) peritrichous
(S) Vibrio cholerae (iv) ovoid (4) polarCorrect
Question 15 of 20
Match items in Group I with sterilization methods in Group II.
Group I Group II
(P) Ampicillin (i) 70 % alcohol treatment
(Q) 1% glucose in phosphate buffer (ii) Autoclaving at 15 psi for 15 min
(R) Plastic syringe (iii) Autoclaving at 10 psi for 20 min
(S) Luria broth (iv) Membrane filtration
(v) γ-ray irradiationCorrect
Question 16 of 20
Which of the following statements are TRUE regarding recA mutants of E. coli?
(P) Exhibit much reduced recombination
(Q) Do not survive UV irradiation
(R) Show no effect on doubling time
(S) Exhibit pleiotropyCorrect
Question 17 of 20
Lophotrichous bacteria haveCorrect
Question 18 of 20
In aerobic respiration the final electron acceptor isCorrect
Question 19 of 20
Limulus Amoebocyte Lysate (LAL) assay is used to identify the presence ofCorrect
Question 20 of 20
Of the following the most effective method to kill bacterial endospores isCorrect