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- Question 1 of 20
Intergenic suppression involves mutation inCorrectIncorrect
- Question 2 of 20
Which one of the following proteins does NOT bind to a gaseous ligand?CorrectIncorrect
- Question 3 of 20
Rheumatic fever is an example ofCorrectIncorrect
- 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?CorrectIncorrect
- Question 5 of 20
Which one of the following is NOT involved in horizontal gene transfer?CorrectIncorrect
- Question 6 of 20
The principle of immunization was first explained byCorrectIncorrect
- Question 7 of 20
Lysozyme catalyzes the breakdown ofCorrectIncorrect
- Question 8 of 20
Which one of the following microscopic techniques can be used to study the contour of proteins?CorrectIncorrect
- 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 synthesisCorrectIncorrect
- 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?CorrectIncorrect
- 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 isCorrectIncorrect
- 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 isCorrectIncorrect
- 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) polarCorrectIncorrect
- 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 irradiationCorrectIncorrect
- 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 pleiotropyCorrectIncorrect
- Question 17 of 20
Lophotrichous bacteria haveCorrectIncorrect
- Question 18 of 20
In aerobic respiration the final electron acceptor isCorrectIncorrect
- Question 19 of 20
Limulus Amoebocyte Lysate (LAL) assay is used to identify the presence ofCorrectIncorrect
- Question 20 of 20
Of the following the most effective method to kill bacterial endospores isCorrectIncorrect