CBSE Class 10 Biology Control and Coordination MCQs Set D

Question: Which of the following endocrine glands is unpaired?
a) Testes
b) Pituitary
c) Ovary
d) Adrenal
Answer: b

Question: Which is not true about brain:
a) There are lobes in fore brain
b) Centres of hearing, smell, memory are located in fore brain
c) Involuntary actions are controlled by medulla in hind brain
d) Cerebellum does not control postures
Answer: d

Question: The hormone which increases the fertility in males is called
a) Oestrogen
b) Growth hormone
c) Insulin
d) Testosterone
Answer: d

Question: Which part of nerve cell acquires information first?
a) Axon
b) Nerve ending
c) Nucleus
d) Dendritic tip
Answer: d

Question: The plant hormone which triggers the fall of mature leaves and fruits from the plant body is
a) Gibberellin
b) Cytokinin
c) Abscisic acid
d) Auxin
Answer: c

Question: Iodine is necessary for the synthesis of which hormone?
a) Auxin
b) Adrenaline
c) Insulin
d) Thyroxin
Answer: d

Question: Impulse flows from ___
a) Dendrite to axon in same neuron
b) Axon to dendrite
c) Nodes of Ranvier to axon
d) None of these
Answer: a

Question: In a neuron, conversion of electrical signal to a chemical signal occurs in
a) Dendrite
b) Axonal end
c) Cell body
d) Axon
Answer: b

Question: Hormones have ______ effect.
a) Stimulatory
b) Inhibitory
c) Both stimulatory and inhibitory
d) Nonregulatory
Answer: c

Question: The brain is lodged inside the cavity of the skull known as
a) Duramater
b) Cranium
c) Piamater
d) Meninges
Answer: b

Question: Lower portion of brain that extends downwards into spinal cord is called
a) Olfactory lobes
b) Pons
c) Cerebellum
d) Medulla
Answer: d

Question: A doctor advised a person to take an injection of insulin because
a) His blood pressure was low
b) His heart was beating slowly
c) His sugar level in blood was high
d) He was suffering from goitre
Answer: c

Question: The substance that triggers the fall of mature leaves and fruits from plants is
a) Auxin
b) Cytokinin
c) Gibberellin
d) Abscisic acid
Answer: d

Question: Central canal of the spinal cord contains
a) Cerebrospinal fluid
b) Aqueous humour
c) Interstitial fluid
d) Pleural fluid
Answer: a

Question: Which Statement Is Not True About Thyroxin?
a) Iron is essential for the synthesis of thyroxin
b) It regulates carbohydrates, protein and fat metabolism in the body
c) Thyroxin is also called thyroid hormone
d) Thyroid gland requires iodine to synthesize thyroxin
Answer: a

Question: For the synthesis of which of the following hormones is iodine necessary?
a) Insulin
b) Adrenaline
c) Thyroxine
d) Auxin
Answer: c

Question: Choose incorrect statement about insulin.
a) It is produced by pancreas
b) It regulates the growth and development of body
c) It regulates blood sugar level
d) Deficiency causes diabetes
Answer: b

Question: Which endocrine gland is called the master gland?
a) Thyroid
b) Pancreas
c) Pituitary
d) Adrenal
Answer: c

Question: Name the hormone which is utilized to produce seedless fruit without fertilization.
a) Ethylene
b) Gibberellins
c) Auxins
d) None of these
Answer: c

Question: Which of the following is a plant hormone?
a) Cytokinin
b) Thyroxin
c) Insulin
d) Oestrogen
Answer: a

Question: The main function of Abscisic Acid in plants is to
a) Increase the length of cells
b) Promote cell division
c) Inhibit growth
d) Promote growth of stem
Answer: c

Question: Which of the following endocrine glands does not occur as a pair in the human body?
a) Adrenal
b) Pituitary
c) Testis
d) Ovary
Answer: b

Question: The shape of guard cells changes due to change in the
a) Temperature of cells
b) Position of nucleus in the cells
c) Amount of water in cells
d) Protein composition of cells
Answer: c

Question: Neurons communicate by sending electrical impulses called
a) Neurotransmitters
b) Action potentials
c) Membrane potentials
d) Neuromodulators
Answer: b

Question: Which is not a part of neuron?
a) Synaptic cleft
b) Lobe
c) Dendrite
d) Nucleus
Answer: b

Question: Spinal cord originates from
a) Cerebellum
b) Pons
c) Medulla
d) Cerebrum
Answer: c

Question: Insulin is secreted by
a) Pancreas
b) Kidney
c) Liver
d) Stomach
Answer: a

Question: The upward and downward growth of shoots and roots, respectively, in response to gravity is
a) Chemotropism
b) Geotropism
c) Hydrotropism
d) None of these
Answer: b

Question: Which one of the endocrine glands is known as the master gland?
a) Pituitary
b) Thyroid
c) Adrenal
d) Parathyroid
Answer: a

Question: Spinal cord is made up of
a) Nephrons
b) Nerves
c) Both a and b
d) Neither a nor b
Answer: b

Question: Dramatic changes of body features associated with puberty are mainly because of secretion of
a) Oestrogen from testes and testosterone from ovary
b) Testosterone from thyroid gland and estrogen from pituitary gland
c) Testosterone from testes and estrogen from ovary
d) Estrogen from adrenal gland and testosterone from pituitary gland
Answer: c

Question: The mixed gland found in humans is
a) Pancreatic gland
b) Pituitary gland
c) Thyroid gland
d) Adrenal gland
Answer: a

Question: The skeletal muscles are controlled by which nervous system?
a) Glial cells
b) Somatic nervous system
c) Autonomic nervous system
d) All
Answer: b

Question: The hormone responsible for male secondary sexual characters is
a) Growth Hormone
b) Thyroxin
c) Testosterone
d) Oestrogen
Answer: c

Question: The growth of stem is known as
a) Positive geotropism
b) Geotropism
c) Gravitropism
d) Negative geotropism
Answer: d

Question: Which of the following control and regulate the life processes?
a) Endocrine and digestive systems
b) Nervous and endocrine systems
c) Respiratory and nervous systems
d) Reproductive and endocrine systems
Answer: b

Question: Melanocyte stimulating hormone is secreted from ______ pituitary gland.
a) Intermediate
b) Posterior
c) Dorsal
d) Anterior
Answer: a

Question: Hormone secreted by the testes is
a) Progesterone
b) Insulin
c) T.S.H
d) Testosterone
Answer: d

Question: Nerves from all over the body meet in a bundle in the ___ on their way to the brain.
a) Cervical spine
b) Spinal cord
c) Ear
d) None of these
Answer: b

Question: Hyposecretion of insulin causes
a) Hypocalcemia
b) Diabetes mellitus
c) Hypercalcemia
d) Irregular growth
Answer: b

Question: The main function of the plant hormone called abscisic acid is to
a) Increase the length of cells
b) Promote cell division
c) Inhibit growth
d) Promote growth of stem and roots
Answer: c

Question: Following hormone is produced by pancreas
a) Thyroxin
b) Insulin
c) Growth hormone
d) All of the above
Answer: b

Question: Junction between two neurons is called
a) Cell junction
b) Neuro muscular junction
c) Neural joint
d) Synapse
Answer: d

Question: Part of the brain which controls respiration and heart beat is
a) Medulla
b) Cerebellum
c) Diencephalon
d) Cerebrum
Answer: a

Question: A growing seedling is kept in a dark room. A burning lamp is placed near to it for a few days. The top part of seedling bends towards the burning candle. This is an example of
a) Chemotropism
b) Hydrotropism
c) Phototropism
d) Geotropism
Answer: c

Question: The growth of tendrils in pea plants is due to the
a) Effect of sunlight on the tendril cells facing the sun
b) Effect of gravity on the part of tendril hanging down towards the earth
c) Rapid cell division and elongation in tendril cells that are away from the support
d) Rapid cell division and elongation in tendril cells in contact with the support
Answer: c

Question: Which of the following plants shows thermonasty at higher temperatures?
a) Lotus
b) Sunflower
c) Tulip
d) Mimosa
Answer: c

Question: ____ conducts impulse from peripheral body parts to brain.
a) Sensory nerve
b) Motor nerve
c) Interneurons
d) Microglia
Answer: a

Question: Following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Assertion(A) : Insulin regulates blood sugar level.
Reason (R) : Insufficient secretion of insulin will cause diabetes.
Answer: a