1636: Which one of the following pairs is not correctly matched ?
(a) Cosmic Background Explorer (COBE) : Satellite programme
(b) Falcon : Under-sea cable system
(c) Discovery : Space shuttle
(d) Atlantis : Space station
1637: Assertion (A):
Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R):
DNA fragments can be manipulated using restriction endonucleases and DNA ligases.
(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 a correct explanation of A
(c) A is true but R is false
(d) A is fasle but R is true
1638: The area of an ellipse is twice that of a circle. The major diameter of the ellipse is twice that of the minor diameter. The radius of the circle is
(a) 50% of minor diameter of the ellipse
(b) 50% of major diameter of the ellipse
(c) minor diameter of the ellipse
(d) major diameter of the ellipse
1639: "Lathyrism" is a crippling disease caused by:
(a) Tinned fish
(b) Chick pea and pulses
(c) Meat
(d) Adulterated oil
1640: The battle of Dharmat was fought between
(a) Muhammad Gori and Jai Chand
(b) Babar and the Afghans
(c) Aurangzeb and Dara Shikoh
(d) Ahmad Shah Durrani and the Marathas