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Plant Physiology MCQ with Answers. We covered all the Plant Physiology MCQ with Answers in this post for free so that you can practice well for the exam.
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MCQ on Plant Physiology for Students
Which gland secretes the growth hormone?
(a) Pituitary gland
(b) Thyroid
(c) Hypothalamus
(d) Adrenal
Option a – Pituitary gland
The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age?
(a) Oestrogen from the testes and testosterone from ovar.
(b) Estrogen from the adrenal gland and testosterone from the pituitary gland.
(c) Testosterone from the testes and estrogen from the ovary.
(d) Testosterone is from the thyroid gland and estrogen is from the pituitary gland.
Option c – Testosterone from the testes and estrogen from the ovary
A diabetic patient suffers from a deficiency of which hormone?
(a) Thyroxine
(b) Testosterone
(c) Oestrogen
(d) Insulin
Option d – Insulin
Which of the following endocrine glands does not exist in pairs?
(a) Testes
(b) Adrenal
(c) Pituitary
(d) Ovary
Option c – Pituitary
The highest coordinating center in the human body is
(a) the spinal cord
(b) the heart
(c) the brain
(d) the kidney
Option c – the brain
The main function of the cerebrum is
(a) thinking
(b) hearing
(c) memory
(d) balancing
Option a – thinking
Posture and balance of the body are controlled by
(a) Pons
(b) Medulla oblongata
(c) Cerebellum
(d) Cerebrum
Option c – Cerebellum
Breathing is controlled by which part of the brain?
(a) Cerebrum
(b) Cerebellum
(c) Hypothalamus
(d) Medulla oblongata
Option d – Medulla oblongata
Which part of the nervous system controls the reflex activities of the body?
(a) Brain
(b) Spinal cord
(c) Cerebrum
(d) Cerebellum
Option b – Spinal cord
Which of the following acts as both an endocrine and exocrine gland?
(a) Pancreas
(b) Thyroid
(c) Adrenal
(d) Liver
Option a – Pancreas
Identify which of the following statements about thyroxin is incorrect.
(a) The thyroid gland requires iodine to synthesize thyroxin.
(b) Thyroxin is also called thyroid hormone.
(c) It regulates protein, carbohydrates, and fat metabolism in the body.
(d) Iron is essential for the synthesis of thyroxin.
Option d – Iron is essential for the synthesis of thyroxin
Which plant hormone promotes cell division?
(a) Auxin
(b) Gibberellin
(c) Cytokinin
(d) Abscisic acid
Option c – Cytokinin
The main function of abscisic acid in plants is
(a) to promote cell division.
(b) to inhibit growth.
(c) to promote the growth of the stem.
(d) to increase the length of cells.
Option b – to inhibit growth
Fall of mature leaves and fruits from plants is triggered by which of the following substance?
(a) Auxin
(b) Cytokinin
(c) Gibberellin
(d) Abscisic acid
Option d – Abscisic acid
Any change in the environment to which an organism responds is called
(a) stimulus
(b) coordination
(c) response
(d) hormone
Option a – stimulus
A part of the body that responds to the instructions sent from the nervous system is called
(a) receptor
(b) effector
(c) nerves
(d) muscles
Option b – effector
The longest fiber on the cell body of a neuron is called
(a) sheath
(b) cytoplasm
(c) axon
(d) dendrites
Option c – axon
Which nerves transmit impulses from the central nervous system toward muscle cells?
(a) Sensory nerves
(b) Motor nerves
(c) Relay nerves
(d) Cranial nerves
Option b – Motor nerves
A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called
(a) neurotransmitter
(b) dendrites
(c) axon
(d) synapse
Option d – synapse
The roots of plants are :
(a) positively geotropic
(b) negatively geotropic
(c) positively phototropic
(d) None of these
Option a – positively geotropic
The response of plant roots toward water is called :
(a) Chemotropism
(b) Phototropism
(c) Hydrotropism
(d) Geotropism
Option c – Hydrotropism
The movement of the sunflower in accordance with the path of the Sun is due to
(a) Chemotropism
(b) Geotropism
(c) Phototropism
(d) Hydrotropism
Option c – Phototropism
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