Q. Which plant hormone promotes dormancy in seeds and buds?
✅ Correct Answer: (D)
Abscisic acid
Control and Coordination MCQs with answers
Dear candidates you will find MCQ questions of 10th Class - Biology | Chapter: Control and Coordination here. Learn these questions and prepare yourself for coming examinations. You can check the right answer of any question by clicking the option or by clicking view answer button.
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Q. Movement of sunflower in accordance with the path of Sun is due to
✅ Correct Answer: (C)
Phototropism
Q. The main function of abscisic acid in plants is
✅ Correct Answer: (B)
to inhibit growth.
Q. Fall of mature leaves and fruits from plants is triggered by which of the following substance?
✅ Correct Answer: (D)
Abscisic acid
Q. Any change in the environment to which an organism responds is called
✅ Correct Answer: (A)
stimulus
Q. A part of the body which responds to the in-structions sent from nervous system is called
✅ Correct Answer: (B)
effector
Q. Which nerves transmit impulses from the cen¬tral nervous system towards muscle cells?
✅ Correct Answer: (B)
Motor nerves
Q. A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called
✅ Correct Answer: (D)
synapse
Q. Growth, mental development and tissue differentiation is controlld by
✅ Correct Answer: (C)
thyroxine
Q. In case of emergency which structure becomes very active
✅ Correct Answer: (A)
adrenal medulla
Q. Which of the following is not associated with growth of plant?
✅ Correct Answer: (D)
Abscisic acid
Q. The main function of abscisic acid in plants is to
✅ Correct Answer: (C)
inhibit growth
Q. Which of the following statements are true about the brain?
(i) The main thinking part of the brain is hind brain.
(ii) Centres of hearing, smell, memory, sight, etc. are located in fore brain.
(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain.
(iv) Cerebellum does not control posture and balance of the body.
(i) The main thinking part of the brain is hind brain.
(ii) Centres of hearing, smell, memory, sight, etc. are located in fore brain.
(iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain.
(iv) Cerebellum does not control posture and balance of the body.
✅ Correct Answer: (C)
(ii) and (iii)
Q. Which of the following statements are true?
(i) Sudden action in response to something in the environment is called reflex action
(ii) Sensory neurons carry signals from spinal cord to muscles
(iii) Motor neurons carry signals from receptors to spinal cord
(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc
(i) Sudden action in response to something in the environment is called reflex action
(ii) Sensory neurons carry signals from spinal cord to muscles
(iii) Motor neurons carry signals from receptors to spinal cord
(iv) The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc
✅ Correct Answer: (C)
(i) and (iv)
Q. Which is the correct sequence of the components of a reflex arc?
✅ Correct Answer: (D)
Receptors ? Sensory neuron ? Spinal cord ? Motor neuron ? Muscle
Q. Breathing is controlled by which part of the brain?
✅ Correct Answer: (D)
Medulla oblongata
Q. Which part of nervous system controls the re¬flex activities of the body?
✅ Correct Answer: (B)
Spinal cord
Q. Which of the following acts as both endocrine and exocrine gland?
✅ Correct Answer: (A)
Pancreas
Q. Identify which of the following statements about thyroxin is incorrect?
✅ Correct Answer: (D)
Iron is essential for the synthesis of thyroxin.
Q. The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age?
✅ Correct Answer: (C)
Testosterone from testes and estrogen from ovary.
Q. A diabetic patient suffers from deficiency of which hormone?
✅ Correct Answer: (D)
Insulin
Q. Which of the following endocrine glands does not exist in pairs?
✅ Correct Answer: (C)
Pituitary
Q. Which of the following tissues provide control and coordination in animals?
✅ Correct Answer: (D)
Nervous and Muscular
Q. A student accidentally places her hand on a flame of candle and quickly pulls her hand away. The flame represents
✅ Correct Answer: (B)
a stimulus
Q. Which statement is incorrect about auxins?
✅ Correct Answer: (A)
They promote the growth of root
Q. Which of the following statements is correct about receptors?
✅ Correct Answer: (A)
Gustatory receptors detect taste while olfactory receptors detect smell
Q. Involuntary actions in the body are controlled by
✅ Correct Answer: (C)
medulla in hindbrain
Q. Ageing in human beings is caused by disappearance of which of the following glands?
✅ Correct Answer: (D)
Thymus
Q. Which hormone regulates the ionic balance in the body?
✅ Correct Answer: (D)
Vasopressin
Q. Which of the following acts as both endocrine and exocrine glands?
✅ Correct Answer: (D)
Pancreas
Q. The main effect of cytokinin in plants is to
✅ Correct Answer: (D)
stimulate cell division
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