Chapter 7
Control and Coordination
MCQs
Q 1.: Nondirectional plant movements are called
(A) Nastic movements
(B) Tropic movements
(C) Cyclosis
(D) Tactic movements
Option – A
Q 2.: The hormone not associated with growth of plant is
(A) Auxins
(B) Abscisic acid
(C) Gibberellins
(D) Cytokinins
Option – B
Q 3.: The phytohormone that reduces transpiration and induces dormancy in seeds is
(A) Ethylene
(B) Acetylene
(C) Abscisic acid
(D) Gibberellins
Option – C
Q 4.: The growth of pollen tubes towards ovules is due to
(A) Hydrotropism
(B) Chemotropism
(C) Geotropism
(D) Phototropism
Option – B
Q 5.: The movement of shoot towards light is
(A) Geotropism
(B) Hydrotropism
(C) Chemotropism
(D) Phototropism
Option – D
Q 6.: The substance that triggers the fall of mature leaves and fruits from plants
(A) Auxins
(B) Gibberellins
(C) Abscisic acid
(D) Cytokinins
Option – C
Q 7.: Hormone that delays aging in plants is
(A) Ethylene
(B) Gibberellins
(C) Cytokinins
(D) Abscisic acid
Option – C
Q 8.: Hormone that stimulates growth of internodal region in plants is
(A) Gibberellins
(B) Cytokinins
(C) IAA
(D) IBA
Option – A
Q 9.: Artificial ripening of fruits is carried out by
(A) Auxins
(B) Kinetin
(C) Ethylene
(D) Zeatin
Option – C
Q 10.: The centre of sense of smell in the brain is
(A) Midbrain
(B) Olfactory lobes
(C) Cerebellum
(D) Cerebrum
Option – D
Q 11.: The number of cranial nerves are present in human beings are
(A) 12 pairs
(B) 31 pairs
(C) 24 pairs
(D) 10 pairs
Option – A
Q 12.: The cerebral lobe responsible for auditory reception is
(A) Occipital
(B) Frontal
(C) Temporal
(D)Parietal
Option – C
Q 13.: The correct order of sequence in a reflex arc is
(A) Receptor→Sensory neuron →Motor neuron→Muscle
(B) Receptor→Motor neuron→Sensory neuron→Muscle
(C) Sensory neuron→Receptor→Motor neuron→Muscle
(D)Muscle→Receptor cells→Motor neuron→Sensory
Option – A
Q 14.: The use of iodised salt is recommended to prevent
(A) Diabetes
(B) Tetany
(C) Goitre
(D) Hypotension
Option – C
Q 15.: Dwarfism results due to
(A) Excess of secretion of thyroxine
(B) Less secretion of growth hormone in childhood
(C) Excess secretion of growth hormone in adult
(D) Less secretion of growth hormone in adult
Option – B
Q 16.: What is the function of pituitary gland?
(A) To develop sex organs in males
(B) To stimulate growth in some organs
(C) To regulate secretions of other endocrine glands in the body
(D) To initiate metabolism in the body
Option – C
Q 17.: Which option correctly shows the order of events when a bright light is focused on our eyes?
(A) Bright light→Receptors in eyes→Sensory neuronaspinal cord→Motor neurons→Eyelid closes
(B) Bright light→Receptors in eyes→ Spinal cord→Sensory neuron→ Motor neurons→ Eyelid closes
(C) Bright light→Receptors in eyes→ Sensory neuron→ motor neurons→ spinal cord→Eyelid closes
(D) Bright light→ Receptors in eyes→Spinal cord → motor neurons→ Sensory neuron→Eyelid closes
Option – A
Q 18.: A female is suffering from an irregular menstrual cycle. The doctor prescribed her some hormonal tablets. Which option shows the hormone she lacks in her body from the endocrine gland?
(A) Oestrogen
(B) Testosterone
(C) Adrenalin
(D) Thyroxin
Option – A
Q 19.: When we touch the leaves of “Touch-me-not” plant, they begin to fold up and droop. How does the plant communicate the information of touch?
(A) The plant uses electrical signals to transfer information from the external environment to cells.
(B) The plant uses electrical-chemical signals to transfer information from cell to cell.
(C) The plant uses electrical-chemical signals to transfer information from tissue to specialized cells.
(D) The plant uses electrical signals to transfer information from cell to specialized tissues.
Option – B
Q 20.: How will information travel within a neuron?
(A) Dendrite→Cell body→Axon→Nerve ending
(B) Dendrite→Axon→Cell body→Nerve ending
(C) Axon→Dendrite→Cell body→Nerve ending
(D) Axon→Cell body→Dendrite→Nerve ending
Option – A
Q 21.: What type of tropism of roots would be observed in the presence of water?
(A) Geotropism
(B) Phototropism
(C) Chemotropism
(D) Hydrotropism
Option – D
Q 22.: Which part of the brain controls the blood pressure?
(A) Spinal cord, Skull , Hypothalamus
(B) Cord, Skull, Cerebrum
(C) Pons, Medulla, Cerebellum
(D) Pons, Medulla, Pituitary
Option – C
Q 23.: Posture and balance of the body is controlled by
(A) Cerebrum
(B) Cerebellum
(C) Medulla
(D) Pons
Option – B
Q 24.: 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
Option – C
Q 25.: Choose the incorrect statement about insulin
(A) It is produced from pancreas
(B) It regulates growth and development of the body
(C) It regulates blood sugar level
(D) Insufficient secretion of insulin will cause diabetes
Option – B
Q 26.: Select the mis-matched pair:
(A) Adrenaline: Pituitary gland
(B) Testosterone: Testes
(C) Estrogen: Ovary
(D) Thyroxin: Thyroid gland
Option – A
Q 27.: The shape of guard cells changes due to change in the
(A) Protein composition of cells
(B) Temperature of cells
(C) Amount of water in cells
(D) Position of nucleus in the cells
Option – C
Q 28.: The growth of tendril in pea plants is due to
(A) Effect of light
(B) Effect of gravity
(C) Rapid cell divisions in tendrillar cells that are away from the support
(D) Rapid cell divisions in tendrillar cells in contact with the support
Option – C
Q 29.: Which of the following is not an involuntary action?
(A) Vomiting
(B) Salivation
(C) Heart beat
(D) Chewing
Option – D
Q 30.: 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) He was suffering from goitre
(D) His sugar level in blood was high
Option – D
Q 31.: Junction between two neurons is called
(A) Cell junction
(B) Neuro muscular junction
(C) Neural joint
(D) Synapse
Option – D
Q 32.: In humans , the life processes are controlled and regulated by
(A) Reproductive and endocrine systems
(B) Respiratory and nervous systems
(C) Endocrine and digestive systems
(D) Nervous and endocrine systems
Option – D
Q 33.: Impulse flows from____________.
(A) Dendrite to axon in same neuron
(B) Axon to dendrite
(C) Nodes of ranvier to axon
(D) None
Option – A
Q 34.: The movement of root away from light is:
(A) Positive phototropism
(B) Negative phototropism
(C) Negative hydrotropism
(D) Positive chemotropism
Option – B
Q 35.: Cretinism results due to:
(A) Excess secretion of growth hormone
(B) Under secretion of thyroxin
(C) Excess secretion of adrenaline
(D) Under secretion of growth hormone
Option – B
Q 36.: The brain is responsible for____________.
(A) Balancing of body
(B) Thinking
(C) Regulating heart beat
(D) All
Option – D
Q 37.: Involuntary actions in the body are controlled by__________.
(A) Medulla in fore brain
(B) Medulla in mid brain
(C) Medulla in hind brain
(D) Medulla in spinal brain
Option – C
Q 38.: The nervous system is divided into the_____ and the____;the former consists of
(A) CNS, PNS, the brain and spinal cord; nerves around the body
(B) CNS, PNS, the nerves around the body; the ventricles
(C) ANS, PNS, the nerves around the body; the ventricles
(D) ANS, CNS, the nerves around the body; the brain and spinal cord
Option – A
Q 39.: What is the role of Schwann cells in neuron?
(A) Somatic N.S
(B) Autonomic N.S
(C) Glial cells
(D) All
Option – B