161: Which of the following features of DNA makes in uniquely suited to store and transmit genetic information from generation to generation ?
(a) Complementarity of the two stands
(b) Double helix
(c) Number of base-pairs per turn
(d) Sugar-phosphate backbone
162: The average speed of a train in the onward journey is 25% more than that of the return journey. The train halts for one hour on reaching the destination. The total time taken for the complete to and fro journey is 17 hours covering a distance of 800 km. The speed of the train in the onward journey is
(a) 45 km per hour
(b) 47.06 km per hour
(c) 50.00 km per hour
(d) 56.25 km per hour
163: Which one of the following cities is nearest to the equator ?
(a) Jakarta
(b) Colombo
(c) Singapore
(d) Manila
164: A person starts from a point A and travels 3 km eastwards to B and then turns left and travels thrice that distance to reach C. He again turns left and travels five times the distance he covered between A and B and reaches his destination D. The shortest distance between the starting point and destination is
(a) 18 km
(b) 16 km
(c) 15 km
(d) 12 km
165: Which one of the following touches the boundary of Iran?
(a) Aral Sea
(b) Lake Balkash
(c) Lake Baikal
(d) Caspian Sea