1)

 Largest part of the brain is ……… .

Class 10 Biology

A)

cerebellum

B)

cerebrum

C)

Brainstem

D)

Hypothalamus

2)

Control and coordination are the functions of the nervous system and ……… in our body.

Class 10 Biology

A)

hormones

B)

brain, spinal cord

C)

cerebrum

D)

Brain

3)

Which of the following endocrine glands does not exist in pairs?

Class 10 Biology

A)

Testes

B)

Adrenal

C)

Pituitary

D)

Ovary

4)

A diabetic patient suffers from deficiency of which hormone?

Class 10 Biology

A)

Thyroxine

B)

Testosterone

C)

Oestrogen

D)

Insulin

5)

The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age?

Class 10 Biology

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.

6)

Which gland secretes the growth hormone?

Class 10 Biology

A)

Pituitary gland

B)

Thyroid

C)

Hypothalamus

D)

Adrenal

7)

Identify which of the following statements about thyroxin is incorrect?

Class 10 Biology

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.

8)

Which of the following acts as both endocrine and exocrine gland?

Class 10 Biology

A)

Pancreas

B)

Thyroid

C)

Adrenal

D)

Liver

9)

Which part of nervous system controls the reflex activities of the body?

Class 10 Biology

A)

Brain

B)

Spinal cord

C)

Cerebrum

D)

Cerebellum

10)

Breathing is controlled by which part of the brain?

Class 10 Biology

A)

Cerebrum

B)

Cerebellum

C)

Hypothalamus

D)

Medulla oblongata

11)

 Posture and balance of the body is controlled by

Class 10 Biology

A)

Pons

B)

Medulla oblongata

C)

Cerebellum

D)

Cerebrum

12)

Main function of cerebrum is

Class 10 Biology

A)

thinking

B)

hearing

C)

memory

D)

balancing

13)

The highest coordinating centre in the human body is

Class 10 Biology

A)

spinal cord

B)

heart

C)

brain

D)

kidney

14)

A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called

Class 10 Biology

A)

neurotransmitter

B)

dendrites

C)

axon

D)

synapse

15)

Which nerves transmit impulses from the cen¬tral nervous system towards muscle cells?

Class 10 Biology

A)

Sensory nerves

B)

Motor nerves

C)

Relay nerves

D)

Cranial nerves

16)

The longest fibre on the cell body of a neuron is called

Class 10 Biology

A)

sheath

B)

cytoplasm

C)

Axon

D)

dendrites

17)

A part of the body which responds to the in-structions sent from nervous system is called

Class 10 Biology

A)

receptor

B)

effector

C)

nerves

D)

muscles

18)

Any change in the environment to which an organism responds is called

Class 10 Biology

A)

Stimulus

B)

coordination

C)

response

D)

hormone

19)

Fall of mature leaves and fruits from plants is triggered by which of the following substance?

Class 10 Biology

A)

Auxin

B)

Cytokinin

C)

Gibberellin

D)

Abscisic acid

20)

The main function of abscisic acid in plants is

Class 10 Biology

A)

to promote cell division.

B)

to inhibit growth.

C)

 to promote growth of stem.

D)

 to increase the length of cells.

21)

Which plant hormone promotes cell division?

Class 10 Biology

A)

Auxin

B)

Gibberellin

C)

Cytokinin

D)

Abscisic acid

22)

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

Class 10 Biology

A)

Chemotropism

B)

Geotropism

C)

Phototropism

D)

Hydrotropism

23)

Response of plant roots towards water is called:

Class 10 Biology

A)

Chemotropism

B)

Phototropism

C)

Hydrotropism

D)

Geotropism

24)

Roots of plants are:

Class 10 Biology

A)

positively geotropic

B)

negatively geotropic

C)

positively phototropic

D)

None of these

25)

Which plant hormone promotes dormancy in seeds and buds?

Class 10 Biology

A)

Auxin

B)

Gibberellin

C)

Cytokinin

D)

Abscisic acid