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Below you will find MCQ Questions of Chapter 6 Life Processes Class 10 Science Free PDF Download that will help you in gaining good marks in the examinations and also cracking competitive exams. These Class 10 MCQ Questions with answers will widen your skills and understand concepts in a better manner.

MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers

MCQ Questions for Class 10 Science Chapter 6 Life Processes with answers

1. Which among the following is the major excretory organ in humans?

(a) Kidney

(b) Small Intestine

(c) Large Intestine

(d) Heart

► (a) Kidney

2. It is necessary to separate oxygenated blood from the deoxygenated blood in mammals

(a) To maintain the body temperature

(b) To provide more oxygen to cells

(c) Both (a) and (b)

(d) None of the above

► (c) Both (a) and (b)

3. "Homeostasis" term was proposed by

(a) Claude Bernard

(b) Walter Cannon

(c) Marcello Malpighi

(d) Henle

► (b) Walter Cannon

4. Minerals absorbed by roots move to the leaf through

(a) Xylem

(b) Phloem

(c) Sieve tube

(d) None of the above

► (a) Xylem

5. Main function of kidney is

(a) Passive absorption

(b) Ultrafiltration

(c) Selective reabsorption

(d) All of the above

► (d) All of the above

6. The chlorophyll in photosynthesis is used for

(a) Absorbing light

(b) Breaking down water molecule

(c) No function

(d) Reduction of CO2

► (a) Absorbing light

7. What will happen if one kidney is removed from the body of a human being ?

(a) Death due to poisoning

(b) Uremia and death

(c) Stoppage of urination

(d) Nothing, the person will survive and remain normal kidney will become hypertrophied

► (d) Nothing, the person will survive and remain normal kidney will become hypertrophied

8. Which of the following are respiratory organs of scorpion?

(a) Lungs

(b) Book-lungs

(c) Gills

(d) Ctenidia

► (b) Book-lungs

9. Which of the following sequences is truly a systemic circulation pathway?

(a) Left auricle → Left ventricle → Pulmonary aorta → Tissues → Right auricle

(b) Left auricle → Left ventricle → Aorta →Arteries →Tissues → Veins → Right atrium

(c) Right ventricle → Pulmonary aorta →Tissues → Pulmonary veins → Left auricle

(d) Right auricle → Left ventricle → Aorta →Tissues → Veins → Right auricle

► (b) Left auricle → Left ventricle → Aorta →Arteries →Tissues → Veins → Right atrium

10. The diffusion of CO2 across the alveolar membrane is 20 times faster than that of O2 because :-

(a) CO2 is actively transferred

(b) The alveolar area available for CO2 diffusion is larger

(c) CO2 is more soluble in H2O than O2, which enables it to pass the membrance more readily

(d) The CO2 pressure gradient in larger

► (d) The CO2 pressure gradient in larger

11. Reabsorption of useful substances from glomerular filtrate occurs in

(a) Collecting tube

(b) Loop of Henle

(c) Proximal convoluted tubule

(d) Distal convoluted tubule

► (c) Proximal convoluted tubule

12. Which one is uricotelic?

(a) Frog and toads

(b) Lizards and birds

(c) Cattle, monkey and man

(d) Molluscs

► (c) Lizards and birds

13. In insects, there is no structural or functional relationship between excretory or digestive system except in

(a) Earthworm

(b) Cockroach

(c) Lizards

(d) Ants

► (c) Cockroach

14. Autotrophs and heterotrophs differ in

(a) How they obtain their carbon.

(b) Whether they are prokaryotic or eukaryotic.

(c) How they reproduce, sexually or asexually.

(d) Whether they use chemicals or light as a source of energy.

► (a) How they obtain their carbon.

15. Most of the carbon dioxide in the blood is carried in the form of

(a) Carbonic acid

(b) Bicarbonates.

(c) Carbaminohaemoglobin.

(d) Dissolved CO2.

► (b) Bicarbonates.

16. Sometimes we get painful cramps in our leg muscles after running for a long time due to the accumulation of:

(a) Hydrochloric acid

(b) Fat

(c) Carbon dioxide

(d) Lactic acid

► (d) Lactic acid

17. Epiglottis guards the opening of

(a) Oesophagus

(b) Eustachian tubes

(c) Larynx

(d) Internal nares

► (c) Larynx

18. Correct order of excretory organs in cockroach, earthworm and rabbit respectively:

(a) Skin, malpighi tubules, kidney

(b) Malpighi tubules, nephridia, kidney

(c) Nephridia, malpighi tubules, kidney

(d) Nephridia, kidney, green gland

► (b) Malpighi tubules, nephridia, kidney

19. The process of taking in CO2 by plants and releasing O2 is component of

(a) Transpiration

(b) Respiration

(c) Endosmosis

(d) Photosynthesis

► (d) Photosynthesis

20. Doctors measure the blood pressure with the instrument known as__________.

(a) Sphygmomanometer

(b) Stethoscope

(c) Thermometer

(d) Manometer

► (a) Sphygmomanometer

21. Which part of the plant helps to absorb water and minerals from the soil?

(a) Root hairs

(b) Roots

(c) Root cap

(d) Tap root

► (a) Root hairs

22. The manufactured food in a green plant moves from the leaves to other parts through________.

(a) Xylem

(b) Phloem

(c) Cortex

(d) Pith

► (b) Phloem

23. The enzymes pepsin and trypsin are secreted respectively by

(a) Stomach and pancreas

(b) Salivary gland and stomach

(c) Liver and pancreas

(d) Liver and salivary gland

► (a) Stomach and pancreas

24. Ornithine cycle performs

(a) ATP synthesis

(b) Urea formation in spleen

(c) Urea formation in liver

(d) Urine formation in liver

► (c) Urea formation in liver

25. Oxygen is carried by:

(a) Leucocytes

(b) Erythrocytes

(c) Platelets

(d) None of the above

► (b) Erythrocytes

26. Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?

(a) Mucus

(b) Pepsin

(c) Trypsin

(d) Bile

► (a) Mucus

27. Breathing is controlled by a centre in the

(a) Lungs

(b) Heart

(c) Cerebellum

(d) Medulla oblongata

► (d) Medulla oblongata

28. Choose the correct statement that describes arteries.

(a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart.

(b) They have thin walls with valves inside, blood flows under low pressure and carries blood away from the heart to various organs of the body.

(c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body.

(d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.

► (d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.

Hope the given MCQ Questions will help you in cracking exams with good marks. These Life Processes MCQ Questions will help you in practising more and more questions in less time.

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