Control and Coordination

Q1: The movement of a plant part in response to the force of attraction exerted by the earth is called:

• Hydrotropism
• Geotropism
• Chemotropism
• Phototropism

Q2: Which of the following statements is correct about receptors?

• Gustatory receptors detect taste while olfactory receptors detect smell
• Both gustatory and olfactory receptors detect smell
• Auditory receptors detect smell and olfactory receptors detect taste
• Olfactory receptors detect taste and gustatory receptors smell

Q3: Made up of only nucleic acid and proteins are:

• Bacteria
• Chloroplast
• Viruses
• Prions

Q4: Which of the following is commonly known as ‘birth hormone’?

• Prolactin
• Oxytocin
• ADH
• FSH

Q5: A big tree falls in a forest, but its roots are still in contact with the soil. The branches of this fallen tree grow straight up (vertically). This happens in response to:

• Water and light
• Water and minerals
• Gravity and water
• Light and gravity

Q6: Electrical impulse travels in a neuron from

• Dendrite axon → axonal end → cell body
• Cell body → dendrite → axon → axonal end
• Dendrite → cell body → axon → axonal end
• Axonal end → axon → cell body → dendrite

Q7: Master gland of the body is:

• thyroid
• adrenal
• penial
• pituitary

Q8: Which of the following gland is unpaired?

• Adrenal
• Testis
• Pituitary
• Ovary

Q9: The main function of the plant hormone called abscisic acid is to:

• Increase the length of cells
• Promote cell division
• Inhibit growth
• Promote growth of stem and roots

Q10: In a synapse, chemical signal is transmitted from

• dendritic end of one neuron to axonal end of another neuron
• axon to cell body of the same neuron
• cell body to axonal end of the same neuron
• axonal end of one neuron to dendritic end of another neuron

Q11: The mixed gland found in humans is:

• pancreatic gland
• thyroid gland
• pituitary gland
• adrenal gland

Q12: Growth hormone is produced by

• Adrenal
• Pituitary
• Pancreas
• Thyroid

Q13: The growth of tendrils in pea plants is due to the:

• Effect of sunlight on the tendril cells facing the sun
• Effect of gravity on the part of tendril hanging down towards the earth
• Rapid cell division and elongation in tendril cells that are away from the support
• Rapid cell division and elongation in tendril cells in contact with the support

Q14: In a neuron, conversion of electrical signal to a chemical signal occurs at/in

• cell body
• axonal end
• dendritic end
• axon

Q15: Out of the following which gland is both endocrine and exocrine in function ?

• Pancreas
• Pituitary
• Thymus
• Thyroid

Q16: A patient of diabetes is not producing

• Insulin
• Thyroxin
• Oestrogen
• Adrenaline

Q17: The plant hormone which triggers the fall of mature leaves and fruits from the plant body is:

• Auxin
• Gibberellin
• Abscisic acid
• Cytokinin

Q18: Which is the correct sequence of the components of a reflex arc?

• Receptors → Muscles → Sensory neuron → Motor neuron → Spinal cord
• Receptors → Motor neuron → Spinal cord → Sensory neuron → Muscle
• Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
• Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Q19: The use of iodized salt is recommended to prevent:

• diabetes
• tetany
• goiter
• hypertension

Q20: A person consuming sea food is least likely to develop

• Diabetes
• Goiter
• Both A and B
• Heart Diseases

Q21: The stimulus in the process of thigmotropism is:

• Touch
• Gravity
• Light
• Chemical

Q22: 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) and (ii)
• (i) and (iii)
• (i) and (iv)
• (i), (ii) and (iii)

Q23: The correct order of sequence in a reflex arc is:

• Receptor → sensory neuron Motor neuron → Muscle
• Receptor Motor neuron → sensory neuron → Muscle
• sensory neuron → Receptor → Motor neuron Muscle
• Muscle → Receptor cells → Motor neuron → sensory neuron

Q24: Deficiency of ______cause dwarfism

• GH
• FSH
• LH
• All of these

Q25: 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:

• Chemotropism
• Hydrotropism
• Phototropism
• Geotropism

Q26: 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) and (ii)
• (i), (ii) and (iii)
• (ii) and (iii)
• (iii) and (iv)

Q27: Non-directional plant movements are called:

• Nastic movements
• Tropic movements
• Cyclosis
• Tactic movements

Q28: _______is responsible for maintaining biological clock of body

• Pineal
• Kidney
• Thyroid
• Adrenal

Q29: Dandelion flowers open the petals in bright light during the daytime but close the petals in dark at night. This response of dandelion flowers to light is called:

• Phototropism
• Thigmonasty
• Chemotropism
• Photonasty

Q30: Posture and balance of the body is controlled by

• cerebrum
• cerebellum
• medulla
• pons

Q31: Name the harmone which is utilized to produce seedless fruit without fertilization:

• ethylene
• gibberellins
• auxins
• none of there

Q32: Name the hormone which controls the basal metabolic rate in animals

• Adrenaline
• Thyroxine
• Aldosterone
• Oxytocin

Q33: The number of pairs of nerves which arises from the spinal cord is:

• 21
• 31
• 41
• 51

Q34: Spinal cord originates from

• cerebrum
• medulla
• pons
• cerebellum

Q35: If reflex action is not according in a man which part of his nervous systen is damaged:

• cerebrum
• cerebellum
• spinal cord
• medulla oblongata

Q36: Hormone associated with gonads

• Testosterone
• Estrogen
• Auxin
• Both (A) and (B)

Q37: Iodine is necessary for the synthesis of which of the following hormone?

• Adrenaline
• Auxin
• Thyroxine
• Insulin

Q38: The movement of shoot towards light is

• geotropism
• hydrotropism
• chemotropism
• phototropism

Q39: Hormone insulin is produced by:

• pineal gland
• thyroid gland
• pancreas
• pituitary gland

Q40: A human hormone reducing blood flow to the digestive system and skin during stress is

• Thyroxin
• Adrenaline
• Growth hormone
• Insulin

Q41: Which of the following controls the involuntary actions in the body?

• Medulla in forebrain
• Medulla in hindbrain
• Medulla in spinal cord
• Medulla in midbrain

Q42: The main function of abscisic acid in plants is to

• increase the length of cells
• promote cell division
• inhibit growth
• promote growth of stem

Q43: Pituitary gland is found on:

• ventral side of brain
• dorsal side of brain
• cerebellum
• cerebrum

Q44: Which of the following control and regulate the life process?

• Reproductive and endocrine systems
• Respiratory and nervous systems
• Endocrine and digestive systems
• Nervous and endocrine systems

Q45: Which of the following is not associated with growth of plant?

• Auxin
• Gibberellins
• Cytokinins
• Abscisic acid

Q46: Which is a plant harmone in following:

• Insulin
• Thyroxin
• Astrogen
• Cytokinin

Q47: A doctor advised a person to take injection of insulin because his:

• Blood pressure was high
• Heart beat was high
• Blood sugar was high
• Thyroxine level in blood was high

Q48: Iodine is necessary for the synthesis of which hormone?

• Adrenaline
• Thyroxin
• Auxin
• Insulin

Q49: Name of the hormone which is secreted by testes of man are:

• adrenaline
• insulin
• testosterone and endosterone
• none of these

Q50: The dramatic changes in body features associated with puberty are mainly because of the secretions of:

• Estrogen from testes and testosterone from ovary
• Estrogen from adrenal gland and testosterone from pituitary gland
• Testosterone from testes and estrogen from ovary
• Testosterone from thyroid gland and estrogen from pituitary gland

Q51: Choose the incorrect statement about insulin

• It is produced from pancreas
• It regulates growth and development of the body
• It regulates blood sugar level
• Insufficient secretion of insulin will cause diabetes

Q52: Deficiency of which hormone causes diabetes ?

• insulin
• gastrin
• relaxin
• extrogen

Q53: Electrical impulse travels in a neuron from:

• Dendrite → axon → axon end → cell body
• Cell body → dendrite → axon → axon end
• Dendrite → cell body → axon → axon end
• Axon end →axon → cell body → dendrite

Q54: Select the mis-matched pair:

• Adrenaline : Pituitary gland
• Testosterone : Testes
• Estrogen : Ovary
• Thyroxin : Thyroid gland

Q55: Fruit ripening is regulated by:

• auxin
• gibberellin
• cytokinin
• ethylene

Q56: The shape of guard cells changes due to change in the

• protein composition of cells
• temperature of cells
• amount of water in cells
• position of nucleus in the cells

Q57: Germination of seed is regulated by:

• auxin
• gibberellin
• cytokinin
• ethylene

Q58: The growth of tendril in pea plants is due to

• effect of light
• effect of gravity
• rapid cell divisions in tendrillar cells that are away from the support
• rapid cell divisions in tendrillar cells in contact with the support

Q59: Phototropism is regulated by:

• auxin
• gibberellin
• cytokinin
• ethylene

Q60: The growth of pollen tubes towards ovules is due to

• hydrotropism
• chemotropism
• geotropism
• phototropism

Q61: Example of reflex action is:

• heart beat
• blood circulation
• sneezing
• all these

Q62: The movement of sunflower in accordance with the path of Sun is due to

• phototropism
• geotropism
• chemotropism
• hydrotropism

Q63: In human body, which part of the brain controls the feeling of pleasure, sex and anger:

• cerebrum
• diencephalon
• cerebellum
• medulla oblongata

Q64: The substance that triggers the fall of mature leaves and fruits from plants is due to

• auxin
• gibberellin
• abscisic acid
• cytokinin

Q65: Part of the brain which controls respiration and heart beat is:

• medulla
• cerebellum
• diencephalon
• cerebrum

Q66: Which of the following statements about transmission of nerve impulse is incorrect?

• Nerve impulse travels from dendritic end towards axonal end.
• At the dendritic end electrical impulses bring about the release of some chemicals which generate an electrical impulse at the axonal end of another neuron.
• The chemicals released from the axonal end of one neuron cross the synapse and generate a similar electrical impulse in a dendrite of another neuron.
• A neuron transmits electrical impulses not only to another neuron but also to muscle and gland cells.

Q67: The largest part of the brain is:

• cerebrum
• cerebellum
• medulla
• mid-brain

Q68: Involuntary actions in the body are controlled by

• medulla in fore brain
• medulla in mid brain
• medulla in hind brain
• medulla in spinal cord

Q69: Unit of impulse transmission is:

• neuron
• nervous system
• brain
• spinal cord

Q70: Which of the following is not an involuntary action?

• Vomiting
• Salivation
• Heart beat
• Chewing