266: Colour blindness is:
(a) More common among women
(b) Very rare in women
(c) Very rare in men
(d) Found to the same extent in both the sexes
267: Assertion (A):
West-flowing rivers of Peninsular India have no deltas.
Reason (R):
These rivers do not carry any alluvial sediments.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
268: Match List I with List II and select the correct answer using the codes given below the Lists :
List I List II
(Achievement in genetics) (Scientists)
I. Discovery of tramsdiction and Conjugation in bacteria (A) Khurana
II. Establishing the sex-linked inheritance (B) Kornberg
III. Isolation of DNA polymerase form E. coli (C) Lederberg
IV. Establishing the complete genetic code (D) Morgan
(E) Ochoa
Codes:
(a) I-D, II-C, III-B, IV-A
(b) I-C, II-D, III-A, IV-E
(c) I-D, II-C, III-A, IV-E
(d) I-C, II-D, III-B, IV-A
269: The problem of international liquidity is related to the non-availability of
(a) goods and services
(b) gold and silver
(c) dollars and other hard currencies
(d) exportable surplus
270: With reference to the latest developments in stem cell research, consider the following statements:
1. The only source of human stem cells are the embryos at blastocyst stage
2. The stem cells can be derived a without causing destruction to blastocysts
3. The stem cells can regenerate themselves in vitro virtually forever
4. Indian research centres also created a few cell lines which can be developed into many types of tissues
Which of these statements are correct?
(a) 1, 2, 3 and 4
(b) 1, 2 and 3
(c) 1, 2 and 4
(d) 3 and 4