Question 1
Which of the following is a plant hormone?

(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin

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Solution

(d) Cytokinin

Cytokinin is a plant hormone. Cytokinins are a class of plant growth substances (phytohormones) that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth, and leaf senescence.

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Question 13
Iodine is necessary for the synthesis of which hormone?

(a) Adrenaline
(b) Thyroxine
(c) Auxin
(d) Insulin

Question 48
Mention one function for each of these hormones.

(a) Thyroxin
(b) Insulin
(c) Adrenaline
(d) Growth hormone
(e) Testosterone

Which of the following hormone prepares our body for action in emergency situations ?

(a) testosterone (b) insulin (c) thyroxine (d) adrenaline

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