Plant Hormones and Their Functions

The video tutorial explores the five major plant hormones: auxin, gibberellin, cytokinin, abscisic acid, and ethylene. It explains their functions, such as cell elongation, stem growth, cell division, growth inhibition, and fruit ripening. The tutorial also provides mnemonic techniques to help remember these functions for exams.

What is the primary function of auxin in plants?

• Fruit ripening

• Cell elongation

• Seed germination

• Cell division

How does auxin contribute to phototropism?

• By inhibiting growth on the shaded side

• By moving away from the light

• By moving towards the light

• By increasing cell division on the light side

What is the main role of gibberellin in plants?

• Stem elongation

• Closing stomata

• Promoting fruit ripening

• Inhibiting growth

Which hormone is responsible for the elongation of seedless grapes?

• Ethylene

• Auxin

• Gibberellin

• Cytokinin

What is the primary function of cytokinin in plants?

• Fruit ripening

• Cell elongation

• Inhibiting growth

• Cell division

Which hormone is crucial for branching in plants?

• Auxin

• Gibberellin

• Cytokinin

• Abscisic acid

What is the role of abscisic acid during drought conditions?

• Promoting cell division

• Opening stomata

• Closing stomata

• Promoting seed germination

How does abscisic acid affect seed germination?

• It accelerates germination

• It inhibits germination

• It has no effect

• It promotes germination

What is the primary function of ethylene in plants?

• Cell division

• Fruit ripening

• Stem elongation

• Inhibiting growth

How does ethylene affect the ripening of nearby fruits?

• It slows down ripening

• It has no effect

• It stops ripening

• It accelerates ripening