Class 10 Science · Chapter 6

Control and Coordination

175 Class 10 Science questions on Control and Coordination from the NCERT textbook, NCERT Exemplar and CBSE board papers 2024–2026, each with its answer and a step-by-step solution.

CBSE Class 10 Science previous year papers, with answers →

Questions · page 5 of 9

1. Q81 CBSE 2026
   Identify the type ​of tropic movement ​that is responsible ​for ​the movement of the pollen ​tube towards an ovule from ​the ​following ​options.

   1. (a)Hydrotropism
   2. (b)Geotropism
   3. (c)Chemotropism
   4. (d)Phototropism
   Show answer

   (c) Chemotropism

   Step-by-step solution →
2. Q82 CBSE 2026
   Identify ​the endocrine ​gland ​that ​regulates the growth ​of human ​body.

   1. (a)Pituitary gland
   2. (b)Thyroid gland
   3. (c)Pancreas
   4. (d)Adrenal gland
   Show answer

   (a) Pituitary gland

   Step-by-step solution →
3. Q83 CBSE 2026
   Name the ​plant hormone ​that inhibits plant growth ​and is ​responsible ​for wilting ​of leaves.

   1. (a)Cytokinin
   2. (b)Abscisic acid
   3. (c)Auxin
   4. (d)Gibberellin
   Show answer

   (b) Abscisic acid

   Step-by-step solution →
4. Q84 CBSE 2026
   Walking in a straight line and riding a bicycle are ​activities which are possible due to coordination of ​which ​part of the brain ​? (Part of the Brain) — ​(Name of ​the area ​of the Brain)

   1. (a)Fore-Brain — Cerebrum
   2. (b)Mid-Brain — Cerebellum
   3. (c)Hind-Brain — Cerebellum
   4. (d)Hind-Brain — Medulla
   Show answer

   (c) Hind-Brain — Cerebellum

   Step-by-step solution →
5. Q85 CBSE 2026
   The growth of ​tendril ​in ​pea plant ​is due to which ​of ​the following ​?

   1. (a)Effect of chemotropism
   2. (b)Effect of gravity
   3. (c)Rapid growth of part of the tendril away from the point of contact with the support (object)
   4. (d)Rapid growth of the part of the tendril in contact with the support (object)
   Show answer

   (c) Rapid growth of part of the tendril away from the point of contact with the support (object)

   Step-by-step solution →
6. Q86 CBSE 2026
   Identify ​the ​gland ​in our ​body whose ​over-secretion will ​result in giant-sized ​children.

   1. (a)Pituitary
   2. (b)Thyroid
   3. (c)Adrenal
   4. (d)Pancreas
   Show answer

   (a) Pituitary

   Step-by-step solution →
7. Q87 CBSE 2026
   Identify ​the ​gland that enables the ​human ​beings to deal with an ​emergency ​situation.

   1. (a)Pineal gland
   2. (b)Pituitary gland
   3. (c)Adrenal gland
   4. (d)Pancreatic gland
   Show answer

   (c) Adrenal gland

   Step-by-step solution →
8. Q88 CBSE 2026
   Human brain ​has various ​parts or regions that help in different actions, responses and ​coordination. From the following, identify the part responsible ​for precision ​of ​voluntary ​actions :

   1. (a)Cerebrum
   2. (b)Cerebellum
   3. (c)Medulla
   4. (d)Pons
   Show answer

   (b) Cerebellum

   Step-by-step solution →
9. Q89 CBSE 2026
   From the ​given situations, identify ‘Chemotropic’ and ‘Geotropic’ ​movements in parts of plants, respectively :

   1. (i)Growth of pollen tube ​towards ovule.
   2. (ii)Movement ​of sunflower towards ​sunlight.
   3. (iii)​Movement of root towards Earth/Gravity.
   4. (iv)Movement of leaves due to breeze. Choose the correct option ​:

   1. (a)(i) and (iii) respectively
   2. (b)(iii) and (i) respectively
   3. (c)(i), (ii) and (iii), (iv) respectively
   4. (d)(i), (iii) and (ii), (iv) respectively
   Show answer

   (a) (i) and (iii) respectively

   Step-by-step solution →
10. Q90 CBSE 2026
    In ​a synapse, the ​chemical signal ​is ​transmitted ​from :

    1. (a)Dendritic end of one neuron to axonal end of another neuron.
    2. (b)Axon to cell body of the same neuron.
    3. (c)Cell body to axonal end of the same neuron.
    4. (d)Axonal end of one neuron to dendritic end of another neuron.
    Show answer

    (d) Axonal end of one neuron to dendritic end of another neuron.

    Step-by-step solution →
11. Q91 CBSE 2026
    Identify ​the ​hormone ​that regulates carbohydrate, protein and fat ​metabolism ​in ​the body :

    1. (a)Growth hormone
    2. (b)Adrenaline
    3. (c)Thyroxin
    4. (d)Testosterone
    Show answer

    (c) Thyroxin

    Step-by-step solution →
12. Q92 CBSE 2026
    Following are the statements about the ​different parts of the brain. Select ​the correct statements.

    1. (i)The thinking part of the brain ​is the forebrain.
    2. (ii)Centres for smell, ​hearing, memory, sight ​are located in forebrain.
    3. (iii)Salivation, vomiting, blood pressure are ​controlled by medulla in the ​hind brain.
    4. (iv)​Cerebellum does not control the posture and balance of the body.

    1. (a)(i), (ii) and (iii)
    2. (b)(ii), (iii) and (iv)
    3. (c)(i), (ii) and (iv)
    4. (d)(i), (iii) and (iv)
    Show answer

    (a) (i), (ii) and (iii)

    Step-by-step solution →
13. Q93 CBSE 2026
    A man underwent ​MRI of ​brain which ​shows some defects ​in ​the cerebellum of his brain. ​Which ​activity of that person will be affected ?

    1. (a)Heart beat
    2. (b)Feeling of hunger and thirst
    3. (c)Reflexes
    4. (d)Walking in straight line
    Show answer

    (d) Walking in straight line

    Step-by-step solution →
14. Q94 CBSE 2026
    Select the ​incorrect statement ​from ​the ​following :

    1. (a)Iodine is necessary for production of thyroxin hormone by pituitary gland.
    2. (b)Thyroxin regulates metabolism of carbohydrates, fats and protein.
    3. (c)Swelling of neck may indicate goitre due to iodine deficiency.
    4. (d)Thyroid is located in the neck region in our body.
    Show answer

    (a) Iodine is necessary for production of thyroxin hormone by pituitary gland.

    Step-by-step solution →
15. Q95 CBSE 2026
    In ​plants, the ​role ​of ​cytokinin ​is ​to/in ​:

    1. (a)promote cell division
    2. (b)wilting of leaves
    3. (c)promote opening of stomatal pore
    4. (d)growth of stem
    Show answer

    (a) promote cell division

    Step-by-step solution →
16. Q96 CBSE 2026
    The ​growth of tendrils in grapes plants ​is ​due ​to ​:

    1. (a)Effect of light
    2. (b)Effect of gravity
    3. (c)Rapid cell division in tendril cells in contact with the support
    4. (d)Rapid cell division in tendril cells that are away from the support
    Show answer

    (d) Rapid cell division in tendril cells that are away from the support

    Step-by-step solution →
17. Q97 CBSE 2026
    Directions ​: Question numbers ​8 and ​9 are Assertion and Reason based questions. Two ​statements ​are given, one ​labelled as Assertion (A) and the other is labelled as Reason (R). Select the correct answer ​to these questions from ​the codes (a), (b), (c) and (d) as given below :

    Assertion (A): Reflex actions do not involve thinking.

    Reason (R): Most reflex actions are controlled by the spinal cord.

    1. (a)Both, Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
    2. (b)Both, Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
    3. (c)Assertion (A) is true, but Reason (R) is false.
    4. (d)Assertion (A) is false, but Reason (R) is true.
    Show answer

    (a) Both, Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

    Step-by-step solution →
18. Q98 CBSE 2026
    Two statements are given, one labelled as ​Assertion (A) ​and the ​other ​is labelled as Reason (R). Select the correct answer to ​these ​questions from the codes (a), (b), (c) and (d) as given :

    Assertion (A): Plants have hormones that do not control directional growth.

    Reason (R): Abscisic acid inhibits growth.

    1. (a)Both, Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
    2. (b)Both, Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
    3. (c)Assertion (A) is true, but Reason (R) is false.
    4. (d)Assertion (A) is false, but Reason (R) is true.
    Show answer

    (b) Both, Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

    Step-by-step solution →
19. Q99 CBSE 2026
    Question No. 8 & 9 consists of two statements – Assertion ​(A) ​and ​Reason ​(R). ​Answer these questions selecting the appropriate option from (a), (b), ​(c) and (d) given ​below :

    Assertion (A): In case of iodine deficiency in our diet, there is a possibility that we might suffer from goitre.

    Reason (R): One of the symptoms of goitre is swelling of neck.

    1. (a)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
    2. (b)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
    3. (c)Assertion (A) is true, but Reason (R) is false.
    4. (d)Assertion (A) is false, but Reason (R) is true.
    Show answer

    (b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

    Step-by-step solution →
20. Q100 CBSE 2026
    Question No. ​8 & 9 ​consists ​of two statements ​– Assertion (A) ​and Reason (R). Answer these questions ​selecting the appropriate option from (a), (b), (c) and (d) ​given below :

    Assertion (A): A reflex arc provides an immediate and automatic response to a stimulus.

    Reason (R): The nerve pathway in a reflex arc involves the brain for the fastest possible processing.

    1. (a)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
    2. (b)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
    3. (c)Assertion (A) is true, but Reason (R) is false.
    4. (d)Assertion (A) is false, but Reason (R) is true.
    Show answer

    (c) Assertion (A) is true, but Reason (R) is false.

    Step-by-step solution →