4231: A hydrogen inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will
(a) Decrease in size
(b) Flatten into a disc-like shape
(c) Increase in size
(d) Maintain the same size and shape
4232: 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
4233: Pampas are the vast grassy plains of:
(a) South America
(b) North America
(c) Africa
(d) Eurasia
4234: It is said that of the five doctrines taught by Jainism four were taken over by Mahavira from previous teachers and only one was added by him. Which one of the following was the doctrine added by him ?
(a) Do not commit violence
(b) Observe continence
(c) Do not acquire property
(d) Do not speak a lie
4235: In India, in which one of the following types of forests is teak a dominant tree species?
(a) Tropical moist deciduous forest
(b) Tropical rain forest
(c) Tropical thorn scrub forest
(d) Temperate forest with grasslands