✓ Board-verified
Science · 2024 · 2 marks
CBSE 2024 · Region 3 · Set 1 · Q22
Where are auxins synthesized? How do they promote phototropism?
Where are auxins synthesized ? How do they promote phototropism ?
Marking-scheme solution
Synthesized at shoot tip/root tip
When light falls on one side of the plant, auxin diffuses towards the shady side of shoot. The concentration of auxin stimulates the cells to grow longer on the side of shoot which is away from light. Thus plant appears bent towards light/phototropism.
All Control and Coordination questions2024 question paperNCERT solutions: Control and CoordinationPractice Control and Coordination →
More from Control and Coordination
- Write the name and location of a hormone which helps a person to respond when chased by a dog. Mention the responses in the body which help him to…2024
- Assertion: In our actions of writing or talking, our nervous system communicates with the muscles. Reason (R): Cranial nerves and spinal nerves form…2025
- How is an electric impulse created in human nervous system? Identify the parts of a neuron which helps the nerve impulse to travel (i) towards the…2023
- (i) Define a reflex arc. Why have reflex arcs evolved in animals? Trace the sequence of events which occur, when you suddenly touch a hot object.…2024
- Identify an involuntary action from the following:2024
- Some plants like pea plants have tendrils which help them to climb up other plants. Explain how is it done. Name the plant hormone responsible for…2023
- How is brain protected in our body? A doctor finds in one of his patients that he is not maintaining a proper posture and balance of his body. State…2025
- Give reasons for the following: Adrenal gland is known as the stress gland of the body. Prenatal sex determination is banned in India. Vegetative…2026
CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.