PRACTICE TEST -1 -Class 10 -Science Biology-Chapter 6

Welcome to your Class 10 -biology-Control and coordination

During adverse environmental conditions, plants develop a stress hormone, which is

Abscisic acid

Ethylene

Benzyl amino purine

Dichlorophenoxy acetic acid

Which of the following is an incorrect pair?

i. Effector organ of somatic reflex- Skeletal muscles

ii. Receptor organ of somatic reflex- Smooth muscles

iii. Effector organ of visceral reflex- Skin

iv. Receptor organ of visceral reflex- Epithelial lining of the gut

(i) and (iii)

(ii) and (iii)

All of the above

None of the above

Clinostat is the apparatus, which is used to

Measure growth of stem.

Eliminate the effect of gravity causing geotropism.

Identify the chemicals present in stem tip.

Measure growth rate.

Column I Column II

A. Auxin 1. Flowering

B. Cytokinins 2. Phototropism

C. Gibberellins 3. Cell division

D. Abscisic acid 4. Fruit ripening

E. Ethylene 5. Stomatal opening and closing

Match Column I with Column II and select the correct option from the codes given below:

A- 2, B- 3, C- 1, D- 5, E- 4

A- 2, B- 3, C- 5, D- 1,E- 4

A- 2, B- 5, C- 3, D- 4,E- 1

A- 5, B- 2, C- 3, D- 1,E- 4

Mowing of a grass lawn facilitate better maintenance primarily owing to

Removal of apical dominance and promotion of lateral meristem

Wounding which stimulate rapid regeneration

Removal of apical dominance and promotion of intercalary meristems

Removal of apical dominance

An infant was having a sound sleep, he suddenly woke up with the noise of the drums outside. Which receptor in the infant is responsible for the detection of the sound?

Gustatory receptor

Auditory receptor

Olfactory receptor

None of the above

Which of the following statements are correct?

a. Cytokinins suppress the synthesis of chlorophyll.

b. Auxins control apical dominance.

c. Gibberellins promote shoot elongation.

d. Abscisic acid enables the seeds to withstand desiccation.

a and b only

b and c only

a and c only

b, c and d only

Match the following:

Column I

Column II

A. Hypothalamus

p. Reflex action

B. Cerebellum

q. Balance

C. Medulla oblongata

r. Intelligence

D. Cerebrum

s. Water balance

A- s, B- q, C- p, D- r

A- r, B- q, C- p, D- s

A- q, B- s, C- p, D- r

A- r, B- s, C- p, D- q

Match and choose the correct option.

List I List II

1 Human urine a Cytokinin

2 Gibberella fujikuroi b Auxin

3 Herring fish DNA c Ethylene

4 Ripening fruits

d Abscisic acid

5 Closing of stomata e Gibberellins

1- b, 2- e, 3- a, 4- c, 5- d

1- b, 2- c, 3- d, 4- e, 5- a

1- a, 2- e, 3- b, 4- d, 5- c

1- c, 2- b, 3- a, 4- e, 5- d

The part of the brain which is involved in interpreting an input, storing input information and initiating a response in the light of similar past experience is:

Association area

Motor area

Pons

Cerebellum

A condition of extreme mental and usually motor excitement, hallucinations and marked rapid confusion are the symptoms of

Wernicke's disease

Delirium tremens

Jolliffe's encephalopathy

Korsakoff's syndrome

Correct the following statements by replacing the terms underlined (wherever necessary) and select the correct option.

(i) The part of human brain which regulates heart beat is called cerebrum.

(ii) Chemotropism is directional movement.

(iii) The centre for sexual behaviour is situated in medulla oblongata.

(iv) The plant hormone named after the fungus causing bakane disease is IAA.

(v) Centre for hunger and thirst is located in diencephalon.

(i) Hypothalamus (ii) Tropic (iii) Cerebrum (iv) Auxin (v) Diencephalon

(i) Medulla oblongata (ii) Directional (iii) Hypothalamus (iv) Gibberellin (v) Diencephalon

(i) Hypothalamus (ii) Tropic (iii) Cerebrum (iv) Auxin (v) Metencephalon

(i) Medulla oblongata (ii) Directional (iii) Hypothalamus (iv) Gibberellin (v) Metencephalon

Storage sprouting of potato can be prevented by

Nissl granules are found in cyton of nerve cells. These have affinity for basic dyes. The granules are made up of

Reflex action is

Stimulus → → Sensory neuron → → Spinal cord → → Motor neuron → → Response

Stimulus → → Motor neuron → → Sensory neuron → → Response

Reception → → Motor neuron → → Sensory neuron → → Response

Sensory neuron → → Stimulus → → Motor neuron → → Response

Nerve impulse

Is carried by afferent and efferent fibres.

Is not carried by any afferent or efferent fibres.

Is carried away by afferent fibres and brought about by efferent fibres.

Is brought by afferent fibres and carried by efferent fibres.

Which is the correct match?

Dendrite - Accepts signal / stimulus

Dendrite - Sends signal / stimulus

Axon - Smallest part of neuron

Synaptic knob - Present at the end of dendron

Which of the following are true about the brain?

A. The main thinking part of the brain is the hindbrain.

B. Centres of hearing, smell, memory, sight, etc., are located in the forebrain.

C. Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.

D. Cerebellum does not control posture and balance of the body.

A and B

A, B and C

B and C

D and C

Accidents can happen due to motion of the body.

The communication between the central nervous system and the other parts of the body is facilitated by the

Chapter 5 - Life Process

Chapter 6 -Control and Coordination

Chapter 7: How Do Organisms Reproduce

Chapter 8 :Heredity and Evolution

ASSERTION AND REASON

CASE BASED QUESTIONS

Curriculum

Ncert Class 10 - science - Biology