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