PRACTICE TEST -2 -Class 10 -Science Biology-Chapter 6

Welcome to your Ncert - class 10- science - Chapter 6 – Control and Coordination 2

A typical neuron has a myelin sheath insulating its axon. It is formed from cells known as Schwann cells. Some nervous system disorders, such as adrenoleukodystrophy result from the deterioration of the myelin sheath.

Why is the myelin sheath important to the correct functioning of the neuron?

None of these

Gaps in the myelin sheath allow for saltatory conduction, where electrical impulses jump from one covered area to another

The myelin sheath blocks external signals that originate outside the neuron, preventing interference with nervous signal transmission

The surface of the myelin sheath carries many receptors for neurotransmitters, allowing the neuron to receive chemical signals

None

If you see a tiger running towards you and you felt that your respiration and heartbeat has started increasing and then you also started running. Which hormone has been responsible for this?

Both A and B

Cortisol

Noradrenaline

Thyroxine

None

Which of the following hormones is not a growth promoter ?

Abscisic acid

Cytokinin

Auxin

Gibberellin

None

To speed up the malting process in brewing industry the growth hormone used is ____________.

kinetin

auxin

gibberellin

ethylene

None

Geotropic response of root is due to

Lower rate of growth in the stem

Higher auxin content of stem

Higher growth on upper side of root

Higher rate of growth in the stem

None

Choose the correct answer from the alternatives given.

The mitotically active and hormone producing cells are:

cortex,

xylem

meristem

phloem

None

Match the plant hormones listed in column I with their major role listed in column II and select the corret option from the codes given below.

Column I	Column II
(A) Auxin	(i) Fruit ripening
(B) Cytokinin	(ii) Phototropism
(C) Abscisic acid	(iii) Suppression of cell division
(D) Ethylene	(iv) Stomatal opening and closing
	(v) Growth of lateral buds

A - (iii), B - (ii), C - (iv), D - (i)

A - (ii), B - (v), C - (iv), D - (i)

A - (ii), B - (iv), C - (v), D - (iii)

A - (v), B - (iii), C - (iv), D - (ii)

None

Tendrils and twiners come in contact with their support by means of

Anemotropism

Thigmonasty

Thigmotropism

Nutation

None

In plant tissue culture experiments, high auxin to cytokinin ratio favours .............. development and high cytokinin to auxin ratio favours .............. development.

Root, root

Root, shoot

Shoot, shoot

Shoot, root

None

10.

Match the columns and choose the correct combination. table { border-collapse: collapse; width: 100%; } th, td { border: 1px solid #dddddd; text-align: left; padding: 8px; } th { background-color: #f2f2f2; }

I	II
(a) Cytokinin	(p) Stress hormone
(b) Auxins	(q) Ripening of fruits
(c) Abscisic acid	(r) Apical dominance
(d) Ethylene	(s) Bolting
	(t) Richmond-Lang Effect

a - q, b - s, c - t, d - r,

a - r, b - s, c - q, d - p

a - t, b - r, c - p, d - s

a - t, b - r, c - p, d - q

None

11.

In the context of rice diseases, match List-I with List-II using the codes given the lists.

List-I	List-II
a. Helminthosporium oryzae	1. Gibberella fujikuroi
b. Rhizoctonia solani	2. Balanisa oryzae
c. Fusarium moniliforme	3. Cochliobolus miyabeanus
d. Ephelis oryzae	4. Corticium sasaki

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

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

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

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

None

12.

Choose the correct answer from the alternatives given.

Bakane disease of rice plants is due to the effect of:

cytokinins

ethylene

gibberellins

auxins

None

13.

Which among the following hormones is toxic to plants in large concentrations, regulates protein synthesis and causes bud formation and root initiation?

Cytokinin

Auxin

Ethylene

Gibberellins

None

14.

Select the correct statement regarding the Schwann cells.

Surround axon of myelinated nerve fibre

Form basement membrane of epithelium.

Found in Haversian system of bones

Support muscle fibres

None

15.

Which of the following is synthesized in a very small amount, sometimes it is strictly polarized or transported in a unidirectional manner from where they are synthesized to other parts?

All the above

Plant growth regulators

Organic compound

Water & mineral ions

None

16.

Read the following five statements (i) to (v) regarding left cerebral hemisphere and select the option that correctly states the true (T) and false (F) statements.

(i) It receives most modalities of sensory information from the right side of the body.

(ii) It is usually larger than the right cerebral hemisphere.

(iii) It is the dominant cerebral hemisphere in most individuals.

(iv) It is connected to the right cerebral hemisphere by the corpus callosum.

(v) It contains the main areas for the understanding and production of speech in most individuals.

(i) - T, (ii) - T, (iii) - F, (iv) - F, (v) - F

(i) - F, (ii) - F, (iii) - T, (iv) - T, (v) - T

(i) - T, (ii) - F, (iii) - T, (iv) - T, (v) - T

(i) - F, (ii) - T, (iii) - T, (iv) - F, (v) - T

None

17.

Which of the following statements are correct?

I. Pars intermedia secretes MSH

II. Leydig's cell secretes progesterone

III. Melatonin is secreted by the pineal gland

IV. Myxoedema is a thyroid disorder

V. Neurohypophysis secretes ACTH

II, IV and V

II, III and V

I, III and IV

I, IV and V

None

18.

Hormones used to speed up malting in barley, promote flowering in pineapple and delaying leaf senescence in plants are------------------ respectively.

Gibberellin, Auxin, Cytokinin

Gibberellin, Cytokinin, Auxin

Auxin, Gibberellin, Cytokinin

Cytokinin, Auxin, Gibberellin

None

19.

Choose the correct answer from the alternatives given.

The plant hormone that causes cell elongation is:

abscisic acid

citric acid

indole 3-acetic acid

ethylene

None

20.

More concentration of auxin in horizontally placed plants, under the influence of gravity, occurs in

None of the above

Lower side

Upper side

Both upper and lower side

None

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

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

PRACTICE TEST -2 -Class 10 -Science Biology-Chapter 6 – Control and Coordination