Biology

Plant Growth and Hormones

695 Questions

Plant growth and hormones is a vital topic in biology that covers the physiological effects of different plant regulators like auxins, gibberellins, and cytokinins. These concepts are frequently tested in various general science sections of competitive exams. Practicing these questions helps clarify complex mechanisms like vernalisation, senescence, and tropism for test takers.

Abscisic acid effectsCytokinin functionsAuxins and tropismPlant tissue cultureSenescence in plantsNatural plant hormones

Plant Growth and Hormones Questions

Multiple choice

Which hormone is primarily responsible for the regulation of flowering?

  1. Auxin

  2. Gibberellin

  3. Cytokinin

  4. Florigen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Florigen is the primary hormone that regulates flowering in plants, promoting the transition from vegetative growth to reproductive growth.

Multiple choice

Which hormone is primarily responsible for the regulation of fruit ripening?

  1. Auxin

  2. Gibberellin

  3. Cytokinin

  4. Ethylene
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ethylene is the primary hormone involved in the regulation of fruit ripening, promoting the breakdown of cell walls and the accumulation of sugars and pigments.

Multiple choice

Which hormone is primarily responsible for the regulation of root growth?

  1. Auxin

  2. Gibberellin

  3. Cytokinin

  4. Abscisic Acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Auxin is the primary hormone involved in the regulation of root growth, promoting the elongation and differentiation of root cells.

Multiple choice

Which of the following is a common type of growth regulator used in local agriculture?

  1. Gibberellins

  2. Auxins

  3. Cytokinins

  4. Abscisic acid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gibberellins are a type of growth regulator that promote plant growth and development. They are used in local agriculture to increase crop yield and improve plant quality.

Multiple choice

Which signaling molecule is involved in regulating the development of the limb bud?

  1. FGF

  2. Shh

  3. Wnt

  4. BMP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

FGF (Fibroblast growth factor) is a signaling molecule that plays a crucial role in regulating the development of the limb bud, initiating and maintaining limb outgrowth.