Free Molecular Basis Of Inheritance (Daily Quiz: 6) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

A woman with normal vision, but whose father was colourblind, marries a colourblind man. Suppose that the fourth child of this couple was a boy. This boy

(a) will be partially colourblind since he is heterozygous for the colourblind mutant allele

(b) must have normal colour vision

(c) must be colourblind

(d) may be colourblind or may be of normal vision

Question-2

DNA synthesis can be specifically measured by estimating the incorporation of radio-labelled

(a) deoxyribose sugar

(b) thymidine

(c) uracil

(d) adenine

Question-3

Statement 1 :
UAA, UAG and UGA terminate protein synthesis.
Statement 2 :
They are not recognised by tRNA.

(a) Statement -1 is True, Statement -2 is True ; Statement-2 is NOT a correct explanation for Statement – 1

(b) Statement- 1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement -1

(c) Statement - 1 is True, Statement- 2 is False

(d) Both the Statements are False.

Question-4

Assertion:
DNA act as the genetic material in most of the organisms.
Reason:
DNA is chemically and structurally a stable molecule; it has the power of replication.

(a) If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

(b) If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

(c) If the assertion is true but the reason is false.

(d) If both the assertion and reason are false.

Question-5

If Meselson and Stahl's experiment is continued for four generations in bacteria, the ratio of 15N/15N : 15N/14N : 14N/14N containing DNA in the fourth generation would be

(a) 1 : 4 : 0

(b) 1 : 1 : 0

(c) 0 : 1 : 3

(d) 0 : 1 : 7