TRANSPORTATION SYSTEM AND HORMONES IN PLANTS

What is the name of the signaling molecule that binds to the receptor protein in the reception stage of signal transduction?

• Enzyme

• Receptor

• Auxin

• Ligand

Which of these plant hormone matches with this function:

"Induce parthenocarpy"

• Auxin

• Gibberellin

• Cytokinin

• Abscisic acid

What is the main purpose of the signal transduction pathway in plants?

• To digest nutrients

• To convert intracellular signals into extracellular

• To convert extracellular signals into intracellular signals

• To store energy

Which of the following is the correct order of steps in the signal transduction pathway?

• Transduction → Reception → Response

• Response → Reception → Transduction

• Reception → Transduction → Response

• Response → Transduction → Reception

What is the main function of cytokinin?

• Promotes seed dormancy

• Promotes cell division

• Stimulates fruit ripening

• Inhibits lateral bud growth

Which hormone is produced in the shoot apical meristem and promotes stem elongation?

• Auxin

• Gibberellin

• Cytokinin

• Abscisic acid

Which plant hormone is released under dry conditions to close stomata?

• Gibberellin

• Cytokinin

• Abscisic acid

• Ethylene gas

What is the role of the relay proteins in signal transduction?

• Bind to hormones

• Activate the receptor

• Amplify and convert the signal

• Close stomata

What causes stem bending toward light (phototropism)?

• ABA accumulation

• Cytokinin release on the lighted side

• Auxin concentration on the shaded side

• Auxin concentration on the unshaded side

If the apical bud is removed from a plant, what will likely happen?

• The plant stops growing

• Ethylene production stops

• Lateral buds start growing

• ABA levels increase