206: Which one of the following hormones contains iodine ?
(a) Thyroxine
(b) Testosterone
(c) Insulin
(d) Adrenaline
Explanation:
'Thyroxine' hormone released by 'Thyroid glands'. The deficiency of 'iodine' causes 'Goitre' disease by the enlargement of Thyroid glands. Thyroxine contains iodinated amino acid (tyrosine).
207: Arrange the following in the decreasing order of their carbon content:
I. Cast iron
II. Wrought iron
III. Steel
(a) I, II, III
(b) II, I, III
(c) III, II, I
(d) I, III, II
208: Octopus is
(a) an arthropod
(b) an echinoderm
(c) a heimchordate
(d) a mollusc
209: Consider the following conditions of sick human body
1. Swollen lymph nodes
2. Sweating at night
3. Loss of memory
4. Loss of weight
Which of these are the symptoms of AIDS?
(a) 1 and 2
(b) 2, 3 and 4
(c) 1, 2 and 3
(d) 1, 2, 3 and 4
Explanation:
Acquired Immuno Deficiency Syndrome (AIDS) caused by HIV, a retrovirus is a fatal disease in which immune system of the body is seriously affected.
Symptoms :
1. Swollen lymph nodes.
2. Sweating at night.
3. Loss of weight.
4. Loss of memory.
5. Decreased count of blood platelets causing haemorrhage and fever and
6. Susceptibility to other infections due to breakdown of immune system.
210: Lucerne is a:
(a) Foliage crop
(b) Cereal crop
(c) Fruit crop
(d) Fibre crop