1151: At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us?
1. It is possible to know the pedigree of livestock.
2. It is possible to understand the causes of all human diseases.
3. It is possible to develop disease-resistant animal breeds,
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 2 Only
(c) 1 and 3 only
(d) 1, 2 and 3
1152: Consider the following statements with reference to the Periodic Table of chemical elements :
I. lonisation potential gradually decreases along a period.
II. In a group of elements, electron affinity decreases as the atomic weight increases.
III. In a given period, electronegativity decreases as the atomic number increases.
Which of these statement(s) is/are correct ?
(a) I only
(b) II only
(c) I and III
(d) II and III
1153: Those who give birth to young-ones are called viviparous. Some fishes lay eggs. Therefore:
(a) Some fishes do not lay eggs
(b) Some frogs are fishes
(c) Some frogs do not lay eggs
(d) Some fishes are viviparous
1154: The characteristic odour of garlic is due to
(a) a chloro compound
(b) a sulphur compound
(c) a fluorine compound
(d) acetic acid
1155: Consider the following statements:
1. The last Mauryan ruler, Brihadratha was assassinated by his commander-in-chief, Pushyamitra Sunga.
2. The last Sunga king, Devabhuti was assassinated by his Brahmana minister Vasudeva Kanva who usurped the throne
3. The last ruler of the Kanva dynasty was deposed by the Andhras.
Which of these statements is/are correct?
(a) 1 and 2
(b) Only 2
(c) Only 3
(d) 1, 2 and 3