Questions and answers for exam Preparation

MCQs

Total Questions : 115 | Page 5 of 12 pages

Question 41. In a genetic study, 80 people were found to have alleles for polydactyly. Only 36 of them were
polydactylous. What is the extent of penetrance percentage? ________

Discuss Question

Answer: Option B. -> 45

-NA-

Question 42. In mismatch correction repair, the parental DNA strand is distinguished from the daughter strand by

acetylation
phosphorylation
methylation
glycosylation

Discuss Question

Answer: Option C. -> methylation

-NA-

Question 43. B-lymphocytes originate from the bone marrow whereas T-lymphocytes originate from

thymus
bone marrow
spleen
liver

Discuss Question

Answer: Option B. -> bone marrow

-NA-

Question 44. Idiotypic determinants of an antibody are associated with the

constant region of the heavy chains
constant region of the light chains
variable region
constant regions of light and heavy chains

Discuss Question

Answer: Option C. -> variable region

-NA-

Question 45. The basis for blue-white screening with pUC vectors is

intraallelic complementation
intergenic complementation
intragenic suppression
extragenic suppression

Discuss Question

Answer: Option A. -> intraallelic complementation

-NA-

Question 46. Identification of blood groups involves

precipitation
neutralization
opsonization
agglutination

Discuss Question

Answer: Option D. -> agglutination

-NA-

Question 47. An E. coli cell of volume 10-12 cm3 contains 60 molecules of lac-repressor. The repressor has a binding
affinity (Kd) of 10-8 M and 10-9 M with and without lactose respectively, in the medium.The molar concentration of the repressor in the cell is

0.1 nM
1 nM
10 nM
100 nM

Discuss Question

Answer: Option D. -> 100 nM

-NA-

Question 48. The cost function for a product in a firm is given by 5q2, where q is the amount of production. The
firm can sell the product at a market price of RS. 50 per unit. The number of units to be produced by
the firm such that the profit is maximized is

Discuss Question

Answer: Option A. -> 5

-NA-

Question 49. Choose the grammatically INCORRECT sentence:

They gave us the money back less the service charges of Three Hundred rupees.
This country's expenditure is not less than that of Bangladesh.
The committee initially asked for a funding of Fifty Lakh rupees, but later settled for a lesser sum.
This country's expenditure on educational reforms is very less.

Discuss Question

Answer: Option D. -> This country's expenditure on educational reforms is very less.

-NA-

Question 50. An E. coli cell of volume 10-12 cm3 contains 60 molecules of lac-repressor. The repressor has a binding
affinity (Kd) of 10-8 M and 10-9 M with and without lactose respectively, in the medium.Therefore the lac-operon is