KVS ZIET BHUBANESWAR

CBTI X SCIENCE CH_6_ Control and Coordination

Q. NO QUESTION
MCQ s 1 MARK EACH
1. Which of the following is not associated with growth of the plant?
a) Auxin
b) Cytokinin
c) Abscisic Acid
d) Gibberllin

2.

Observe figures given above. Which of the following shows tropic movements correctly?
(a) A and C (b) B and C (c) B only (d) C only

3. ------------------- are the neuron carrying impulses away from the central nervous system
(a) Efferent nerve
(b) Afferent nerve
(c) Extensors
(d) Sensory nerves

4.
Which is the correct sequence of the components of a reflex arc?
(a) Receptors Muscles Sensory neuron Motor neuron Spinal cord
(b) Receptor Motor neuron Spinal cord Sensory neuron Muscles
(c) Receptor Spinal cord Sensory neuron Motor neuron Muscles
(d) Receptor Sensory neuron Spinal cord Motor neuron Muscles

5. In a neuron, conversion of electrical signal to a chemical signal occurs at/in

(a) Cell body

(b) Axonal end
(c) Dendritic end
(d) Axon
6.

Identify A and B
 (a) A- Cerebrum, B- Cerebellum
(b) A- Cerebellum, B- Cerebrum
(c)) A- Cranium (skull), B- Cerebrum
(d) A- Medulla, B- Cerebrum
7. At the time of puberty both boys and girls show lots of changes in appearance. The
hormones responsible for the changes are
(a) Boys- Testosterone, Girls- Oestrogen
(b) Boys- Oestrogen, Girls- - Testosterone
(c)) Boys- - Testosterone, Girls- Progesterone
(d) Boys- Testis, Girls- Ovary

8.

Growth of pollen tube towards ovule during fertilization is an example of

(a) Phototropism
(b) Hydrotropism
(c)) Geotropism
(d) Chemotropism

9. Assertion (A): Insulin regulates blood sugar level.

Reason (R): Insufficient secretion of insulin will cause diabetes.
(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.

10. Assertion (A): Abscisic acid is responsible for wilting of leaves.

Reason (R): Abscisic acid is a growth promotor.
(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.

11. Receptor is a cell or group of cells that receives stimuli and is usually located in sense
organs. Olfactory receptors are present in
a) eye
b) ear
c) nose
d) tongue
12.

Observe figures given above. Which of the following shows tropic movements correctly?
(a) A and C (b) B and C (c) B only (d) C only

13. What is the correct direction of flow of electrical impulses?

14.

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

(a) Receptors Muscles Sensory neuron Motor neuron Spinal cord
(b) Receptor Motor neuron Spinal cord Sensory neuron Muscles
(c) Receptor Spinal cord Sensory neuron Motor neuron Muscles
(d) Receptor Sensory neuron Spinal cord Motor neuron Muscles

15. While watering a rose plant, a thorn pricked Bholu’s hand. He immediately pulls his hand.
The term used for such types of response is
(a) Reflex arc
(b) Reflex action
(c) Both (a) and (b)
(d) None of the above
16.

Identify A and B
(a) A- Cerebrum, B- Cerebellum
(b) A- Cerebellum, B- Cerebrum
(c)) A- Cranium (skull), B- Cerebrum
(d) A- Medulla, B- Cerebrum
17. At the time of puberty both boys and girls show lots of changes in appearance. The
hormones responsible for the changes are
(a) Boys- Testosterone, Girls- Oestrogen
(b) Boys- Oestrogen, Girls- - Testosterone
(c)) Boys- - Testosterone, Girls- Progesterone
(d) Boys- Testis, Girls- Ovary

18.

Growth of pollen tube towards ovule during fertilization is an example of

(a) Phototropism
(b) Hydrotropism
(c)) Geotropism
(d) Chemotropism

19. Assertion (A): Insulin regulates blood sugar level.

Reason (R): Insufficient secretion of insulin will cause diabetes.
(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.

20. Assertion (A): Abscisic acid is responsible for wilting of leaves.

Reason (R): Abscisic acid is a growth promotor.
(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.

21. 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 external environment
to the 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
the specialised cells.
d) The plant uses electrical signals to transfer information from cell to specialised
tissues.

22. Dramatic changes of body features associated with puberty are mainly because of the
secretion of –
a) Testosterone from thyroid gland and estrogen from pituitary gland.
b) Estrogen from adrenal gland and testosterone from pituitary gland.
c) Testosterone from ovaries and estrogen from testes.
d) Testosterone from testes and estrogen from ovaries.

23. Spinal cord originates from –

a) Medulla
b) Cerebellum
c) Pons
d) Cerebrum

24. Rahul potted some germinated seeds in a pot. He put the pot in a cardboard box that was
open from one side. He keeps the box in a way that the open side of the box faces sunlight
near his window. After 2-3 days, he observes that the shoot bends towards light shown in
image. Which type of tropism did he observe?
a) Phototropism
b) Hydrotropism
c) Chemotropism
d) Geotropism

25. The growth of pollen tubes toward ovules is due to –

a) Chemotropism
b) Hydrotropism
c) Geotropism
d) Phototropism

26. Which is the correct sequence of the components of reflex arc?

a) Receptors -> Motor neuron -> Spinal cord -> Sensory neuron -> Muscle.
b) Receptors ->Sensory neuron -> Spinal cord -> Motor neuron -> Muscle.
 c) Receptors ->Muscle -> Sensory neuron -> Motor neuron -> Spinal cord.
d) Receptors ->Spinal cord -> Sensory neuron -> Motor neuron -> Muscle.

27. Which of the following statement is correct about the receptors?

a) Auditory receptors detect smell and olfactory receptors detect taste.
b) Gustatory receptors detect taste while olfactory receptors detect smell.
c) Both gustatory and olfactory receptors detect smell.
d) Olfactory receptors detect taste and gustatory receptors detect smell.

28. Which of the following options correctly shows the order of event when a bright light is
focused in our eyes?
a) Bright light -> Receptors in eye -> sensory neuron -> spinal cord -> motor neuron
-> eyelid closes
b) Bright light -> receptors in eye -> spinal cord -> sensory neuron -> motor neuron -
> eyelid closes.
c) Bright light -> receptors in eye -> sensory neuron -> motor neuron -> spinal cord
–
d) Bright light -> receptor in eyes -> spinal cord -> motor neuron -> sensory neuron -
> eyelid closes.

29. Dwarfism in human being is caused due to deficiency of –

a) Thyroxin
b) Insulin
c) Growth hormone
d) Adrenalin

30. 1) ASSERTION (A):- The effect of auxin hormone on the on the growth of root is exactly
opposite to that on a stem.
REASON (R):- Auxin hormone increases the rate of growth of growth in root and
decreases the rate of growth in stem. (1)
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true and R is the not correct explanation of A.
c) A is true and R is false.
d) A is false and R is true.

31. The main function of abscisic acid in plants is

(a) to promote cell division.
(b) to inhibit growth.
(c) to promote growth of stem.
 (d) to increase the length of cells.

32. Movement of sunflower in accordance with the path of Sun is due to

(a) Chemotropism
(b) Geotropism
(c) Phototropism
(d) Hydrotropism
33.

Give the missing term.

(a) Spinal cord
(b) Brain
(c) Cranial nerves
(d) Relay nerves
34. Breathing is controlled by which part of the brain?
(a) Cerebrum
(b) Cerebellum
(c) Hypothalamus
(d) Medulla oblongata
35. Which of the following acts as both endocrine and exocrine gland?
(a) Pancreas
(b) Thyroid
(c) Adrenal
(d) Liver

36. Identify which of the following statements about thyroxin is incorrect?

(a) Thyroid gland requires iodine to synthesize thyroxin.
(b) Thyroxin is also called thyroid hormone.
(c) It regulates protein, carbohydrates and fat metabolism in the body.
(d) Iron is essential for the synthesis of thyroxin.

37. The secretion of which hormone leads to physical changes in the body when you are 10-12 years of
age?
(a) Oestrogen from testes and testosterone from ovar.
(b) Estrogen from adrenal gland and testosterone from pituitary gland.
(c) Testosterone from testes and estrogen from ovary.
(d) Testosterone from thyroid gland and estrogen from pituitary gland.
38. Which of the following endocrine glands does not exist in pairs?
(a) Testes
(b) Adrenal
(c) Pituitary
 (d) Ovary

39. 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) : Animals can react to stimuli in different ways.

Reason (R) : All animals have a nervous system and an endocrine system involving hormones.

40. Assertion(A): A receptor is a specialized group of cells in a sense organ that perceive a particular
type of stimulus.
Reason (R) : Different sense organs have different receptors for detecting stimuli.

41. Auxin is a plant hormone that promotes cell elongation and is produced by the apical meristem. It
inhibits the growth of lateral buds which are present at nodes (where leaves attach to the stem). As
long as sufficient auxin is produced by the apical meristem, the lateral buds remain dormant. A
gardener wants the plants in the hedge that he is growing to become bushier with more branches.
Which of the following should he do?
a.Add more manure
b.addmixure of manure and fertilizer
c.Allow more light to fall on the tree
d. Trim the hedge by cutting off the tips of the stems
42. 2.The end product of carbohydrate digestion is sugar. A person went to a patholab to test his blood. It
is found that his average blood sugsr is 174 gm/dl but the normal blood sugar level of a healthy
person is <140 gm/dl . What may be the cause?
a. Improper digestion of food
b.blood vessels are plugged
c. Mal function of pancreas leads to less secretion of insuline
d.Over eating of food containing carbohydrate
43.
Identify the correct sequence of tansmission of nerve impulse in different nuron

1.

2.
 3.

4.

44. Ramesh met an accident and had a head injury. On examining the MRI report doctor said that he had
some problem in ‘speech area’. Identify the part of the brain where the problem lies in the following
diagram
a. A and B b. A only c. C d. C and D only

45. Which of the following statements are true about the brain?

i. The main thinking part of brain is hind brain.

ii. Centers of hearing, smell, memory, sight, etc are located in fore brain.
iii. Salivation, vomiting, blood pressure are controlled by the medulla in the hind brain.
iv. Cerebellum does not controls posture and balance of the body.

1. (i) and (ii)

2. (i), (ii) and (iii)
3. (ii) and (iii)
4. (ii) and (iv)

46. This movement of plant part in response to gravity is called geotropic movement and the
phenomenon involved is called geotropism. Find in figure A, B and C, which appears more accurate
.

47. In each of the following questions, a statement of Assertion is given followed by a corresponding
statement of Reason just below it. Of the statements, mark the correct
answer as
(a) Both assertion and reason are true and reason is the correct explanation of assertion.
(b) Both assertion and reason are true but reason is not the correct explanation of assertion.
(c) Assertion is true but reason is false.
(d) Assertion is false but reason is true
Assertion (A) - Sunflower plant has long internodes with leaves that are far apart.
Reason(R) - Sunflower produces gibberellins for its growth.
48. Which of the following statements are correct? Circle ‘Yes’ or ‘No’ to mark your response.
 .
Statement Yes/No
Hormones are released directly Yes/No
into the bloodstream.
Endocrine glands use electrical Yes/No
impulses
49.
Vicky was going to a crop field where his father was working. While he was going through the
grassy field he saw a sleeping snake and suddenly jumped off (A). Then he walked slowly to escape
without disturbing the snake (B). Two activities were performed by Vicky namely A and B. Can you
compare the above two activities.
a. There is no difference between A and B
b. A is a reflex action and B is controlled action
c. Both are reflex actions.
d. Both activities are controlled by brain

50.

From the above picture find the difference in ripening index of the banana between 30 to 36 hours

51. 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) : Animals can react to stimuli in different ways.
Reason (R) : All animals have a nervous system and an endocrine system involving hormones.

52. Observe the three figures given above.

 1.A and B 2.B and C 3.Only C 4. Only D
53. _____ hormone helps in breaking the dormancy.
a) auxin b)cytokinin c) abscisic acid d) ethylene

54. Which statement is not true about thyroxin

A. Iron is essential for the synthesis of thyroxine

B. It regulates carbohydrates. protein and fat metabolism in the body
C. The thyroid gland requires iodine to synthesize thyroxine
D. Thyroxine is also called thyroid hormone
55. Breathing is controlled by which part of the brain?
(a) Cerebrum
(b) Cerebellum
(c) Hypothalamus
(d) Medulla oblongata
56. Organisms depend on hormones as well as electric impulses for the transmission of signals
from the brain to the rest of the body. What can be a likely advantage of hormones over
electric impulses?
(a) It is secreted by all types of cells present in the body.
(b) It is secreted by stimulated cells and reaches all cells of the body.
(c) It is relayed to the target organ faster than electric impulses.
(d) It does not depend on an external stimulus to be generated in the cells

57. 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

58. The chemical messengers released by endocrine glands are called:

a) Hormones
b) Neurotransmitters
c) Enzymes
d) Digestive juices

59. Which of the following is NOT a reflex action?

a)Blinking of eyes
b) Coughing
 c) Sneezing
d) Shivering

60. The human nervous system is divided into two parts:

a) Central nervous system and autonomic nervous system
b) Central nervous system and peripheral nervous system
c) Peripheral nervous system and autonomic nervous system
d) None of the above

61.
62.
VSA 2 MARKS EACH
1.

Write a and b in the given flow chart of neuron through which information travels as an
electrical impulse.
2. Endocrine glands produce hormones. Hormones are protein in nature, they are chemical
messengers which are discharged in the body by ductless glands from where they reach
different parts of the body.
Name the hormone required for the following. Also mention the name of endocrine gland
from which that hormone is secreted.
(a) Lowering of blood glucose.
(b) Development of moustache and beard in human males.
3.

A potted plant is made to lie horizontally on the ground. Which part of the plant will show
(a) positive geotropism?
(b) negative geotropism?

4.

Write a and b in the given flow chart of neuron through which information travels as an
electrical impulse.
5. Endocrine glands produce hormones. Hormones are protein in nature, they are chemical
messengers which are discharged in the body by ductless glands from where they reach
different parts of the body.
Name the hormone required for the following. Also mention the name of endocrine gland
from which that hormone is secreted.
(a) Lowering of blood glucose.
(b) Development of moustache and beard in human males.
6.

A potted plant is made to lie horizontally on the ground. Which part of the plant will show
(a) positive geotropism?