Plant hormones, also called phytohormones, are chemical compounds made by plants. They can move within the plant and control various processes even in small amounts. Key plant hormones include Auxin, Gibberellin, Ethylene, Abscisic acid, and Cytokinin. These hormones play roles in plant growth and development, like cell growth, making seeds, flowering, and leaf shedding.
Q. Which hormone promotes cell division and root growth?
a) Auxin
b) Cytokinin
c) Gibberellin
d) Ethylene
Ans. a) Auxin
Q. Which hormone is responsible for the elongation of cells in the stem?
a) Gibberellin
b) Cytokinin
c) Auxin
d) Abscisic acid
Ans. c) Auxin
Q. Which hormone is known as stress hormone?
a) Gibberellin
b) Auxin
c) Abscisic acid
d) Cytokinin
Ans. c) Abscisic acid
Q. Which hormone is responsible for the ripening of fruits?
a) Cytokinin
b) Gibberellin
c) Ethylene
d) Auxin
Ans. c) Ethylene
Also Check: Class 9 Maths MCQs
Q. Which hormone promotes seed germination?
a) Gibberellin
b) Auxin
c) Ethylene
d) Abscisic acid
Ans. a) Gibberellin
Q. Which hormone causes leaf fall during autumn?
a) Gibberellin
b) Cytokinin
c) Ethylene
d) Auxin
Ans. c) Ethylene
Q. Which hormone is involved in phototropism?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Abscisic acid
Ans. a) Auxin
Q. Which hormone promotes the closure of stomata?
a) Gibberellin
b) Auxin
c) Cytokinin
d) Abscisic acid
Ans. d) Abscisic acid
Q. Which hormone inhibits growth and induces dormancy in seeds?
a) Gibberellin
b) Auxin
c) Cytokinin
d) Abscisic acid
Ans. d) Abscisic acid
Q. Which hormone is produced in large quantities during seed formation and promotes cell division?
a) Cytokinin
b) Gibberellin
c) Auxin
d) Ethylene
Ans. a) Cytokinin
Q. Which hormone is involved in apical dominance?
a) Gibberellin
b) Cytokinin
c) Auxin
d) Ethylene
Ans. c) Auxin
Q. Which hormone promotes flowering in plants?
a) Gibberellin
b) Auxin
c) Cytokinin
d) Ethylene
Ans. a) Gibberellin
Q. Which hormone promotes the growth of lateral buds?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Ethylene
Ans. b) Gibberellin
Q. Which hormone is known as the “youth hormone”?
a) Gibberellin
b) Cytokinin
c) Auxin
d) Ethylene
Ans. b) Cytokinin
Q. Which hormone is responsible for the shedding of leaves, flowers, and fruits?
a) Ethylene
b) Cytokinin
c) Auxin
d) Gibberellin
Ans. a) Ethylene
Q. Which hormone is used to induce flowering in certain plants?
a) Cytokinin
b) Gibberellin
c) Auxin
d) Ethylene
Ans. b) Gibberellin
Q. Which hormone promotes the growth of fruits?
a) Auxin
b) Gibberellin
c) Ethylene
d) Cytokinin
Ans. b) Gibberellin
Q. Which hormone is involved in the regulation of seed dormancy?
a) Gibberellin
b) Cytokinin
c) Abscisic acid
d) Auxin
Ans. c) Abscisic acid
Q. Which hormone plays a role in gravitropism?
a) Auxin
b) Cytokinin
c) Gibberellin
d) Ethylene
Ans. a) Auxin
Q. Which hormone is involved in wound healing in plants?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Ethylene
Ans. a) Auxin
Q. Which hormone is responsible for the inhibition of lateral bud growth?
a) Cytokinin
b) Auxin
c) Ethylene
d) Gibberellin
Ans. b) Auxin
Q. Which hormone is used to delay fruit ripening?
a) Auxin
b) Ethylene
c) Gibberellin
d) Cytokinin
Ans. b) Ethylene
Q. Which hormone is involved in the regulation of stomatal closure during water stress?
a) Cytokinin
b) Gibberellin
c) Auxin
d) Abscisic acid
Ans. d) Abscisic acid
Q. Which hormone promotes cell differentiation?
a) Gibberellin
b) Cytokinin
c) Auxin
d) Ethylene
Ans. d) Ethylene
Q. Which hormone is responsible for the inhibition of seed germination?
a) Gibberellin
b) Auxin
c) Ethylene
d) Abscisic acid
Ans. d) Abscisic acid
Q. Which hormone is used to promote root formation in cuttings?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Ethylene
Ans. a) Auxin
Q. Which hormone is responsible for the wilting of leaves?
a) Gibberellin
b) Cytokinin
c) Auxin
d) Ethylene
Ans. d) Ethylene
Q. Which hormone is involved in the closing of leaf and flower buds during the night?
a) Cytokinin
b) Auxin
c) Ethylene
d) Gibberellin
Ans. c) Ethylene
Q. Which hormone promotes the differentiation of vascular tissue?
a) Auxin
b) Gibberellin
c) Cytokinin
d) Ethylene
Ans. a) Auxin
Which hormone promotes the growth of root hairs?
a) Cytokinin
b) Gibberellin
c) Auxin
d) Ethylene
Ans. c) Auxin
