Subjects
Science Test Space
Class 10
Plant and animal hormones
Plant hormones

14. Hormones and their physiological effects

Question:

6 m.

Assertion and reason type questions:

1. Plant hormones:

Assertion:	Application of cytokinin to marked vegetables can keep them fresh for several days.
Reason:	Cytokinins delay senescence of leaves and other organ by mobilisation of nutrients.

Both, A and R, are true but R is not the correct explanation of A
Both, A and R, are true and R is the correct explanation of A
Both A and R are false
If A is true but R is false
If A is false but R is true

2. Auxins

Assertion:	Phenyl Acetic Acid (PAA) and Indole acetic 3 Acetonitrile (IAN) are natural auxins.
Reason:	Indole 3 Butyric Acid (IBA), Indole-3-Propionic Acid, α-Naphthalene Acetic Acid (NAA), 2, 4, 5-T (2,4,5 Trichlorophenoxy Acetic Acid) are some of the natural auxins.

Both A and R are false
Both, A and R, are true and R is the correct explanation of A
Both, A and R, are true but R is not the correct explanation of A
If A is false but R is true
If A is true but R is false

3. Gibberellins and ethylene

Assertion:	The formation of tissue culture from the callus in tissue culture is known as morphogenesis.
Reason:	They also promote the growth of lateral buds even in the presence of apical buds.

Both, A and R, are true but R is not the correct explanation of A
If A is true but R is false
Both, A and R, are true and R is the correct explanation of A
If A is false but R is true

Login or Fast registration

Exit to the topic

Did you find an error?

Copyright © 2026 YaClass Tech Private Limited Contacts Terms and Conditions Privacy Policy