Chapter 6 Life Process | MCQ Question For Class 10 Science English Medium With Answers | SSLC 2021 Exam Preparation In English |

Chapter 6 Life Process

Multiple Choice Questions (MCQ)

1. Which of the following are energy foods?

(a) Carbohydrates and fats

(b) Proteins and mineral salts

(c) Vitamins and minerals

(d) Water and roughage

Answer: (a) Carbohydrates and fats

2. In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?

(a) Saprotrophic nutrition

(b) Parasitic nutrition

(c) Holozoic nutrition

(d) Autotrophic nutrition

Answer: (b) Parasitic nutrition

3. The mode of nutrition found in fungi is:

(a) Parasitic nutrition

(b) Holozoic nutrition

(c) Autotrophic nutrition

(d) Saprotrophic nutrition

Answer: (d) Saprotrophic nutrition

4. Roots of the plants absorb water from the soil through the process of:

(a) diffusion

(b) transpiration

(c) osmosis

(d) None of these

Answer: (c) osmosis

5. The site of photosynthesis in the cells of a leaf is

(a) chloroplast

(b) mitochondria

(c) cytoplasm

(d) protoplasm

Answer: (a) chloroplast

6. In amoeba, food is digested in the:

(a) food vacuole

(b) mitochondria

(c) pseudopodia

(d) chloroplast

Answer: (a) food vacuole

7. Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?

(a) Starch breaking down into sugars.

(b) Proteins breaking down into amino acids.

(c) Absorption of vitamins.

(d) Fats breaking down into fatty acids and glycerol.

Answer: (a) Starch breaking down into sugars.

8. Which region of the alimentary canal absorbs the digested food?

(a) Stomach

(b) Small intestine

(c) Large intestine

(d) Liver

Answer: Answer: (a) Starch breaking down into sugars.

9. The contraction and expansion movement of the walls of the food pipe is called:

(a) translocation

(b) transpiration

(c) peristaltic movement

(d) digestion

Answer: (c) peristaltic movement

10. When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates that rice water contains:

(a) fats

(b) complex proteins

(c) starch

(d) simple proteins

Answer: (c) starch

11. The exit of unabsorbed food material is regu-lated by

(a) liver

(b) anus

(c) small intestine

(d) anal sphincter

Answer: (d) anal sphincter

12. What are the products obtained by anaerobic respiration in plants?

(a) Lactic acid + Energy

(b) Carbon dioxide + Water + Energy

(c) Ethanol + Carbon dioxide + Energy

(d) Pyruvate

Answer: (c) Ethanol + Carbon dioxide + Energy

13. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in

(a) cytoplasm

(b) mitochondria

(c) chloroplast

(d) nucleus

Answer: (b) mitochondria

14. Glycolysis process occurs in which part of the cell?

(a) Cytoplasm

(b) Nucleus

(c) Mitochondria

(d) Chloroplast

Answer: (a) Cytoplasm

15. Name the substances whose build up in the muscles during vigorous physical exercise may

cause cramps?

(a) Ethanol + Carbon dioxide + Energy

(b) Lactic acid + Energy

(c) Carbon dioxide + Water + Energy

(d) Pyruvate

Answer: (b) Lactic acid + Energy

16. Name the pores in a leaf through which respi-ratory exchange of gases takes place.

(a) Lenticels

(b) Vacuoles

(c) Xylem

(d) Stomata

Answer: (d) Stomata

17. The respiratory pigment in human beings is:

(a) carotene

(b) chlorophyll

(c) haemoglobin

(d) mitochondria

Answer: (c) haemoglobin

18. Which plant tissue transports water and min-erals from the roots to the leaf?

(a) Xylem

(b) Phloem

(c) Parenchyma

(d) Collenchyma

Answer: (a) Xylem

19. The movement of food in phloem is called:

(a) transpiration

(b) translocation

(c) respiration

(d) evaporation

Answer: (b) translocation

20. A blood vessel which pumps the blood from the heart to the entire body:

(a) artery

(b) capillary

(c) Vein

(d) Haemoglobin

Answer: (a) artery

21. Name a circulatory fluid in the human body other than blood.

(a) Platelets

(b) RBC

(c) Lymph

(d) Plasma

Answer: (c) Lymph

22. Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by which of the following:

(a) hyla, rana, draco

(b) whale, dolphin, turtle

(c) labeo, chameleon, salamander

(d) hippocampus, exocoetus, anabas

Answer: (d) hippocampus, exocoetus, anabas

23. Name the tube which connects the kidneys to the urinary bladder.

(a) Urethra

(b) Nephron

(c) Tubule

(d) Ureter

Answer: (d) Ureter

24. Which part of nephron allows the selective reabsorption of useful substances like glucose, amino acids, salts and water into the blood capillaries?

(a) Tubule

(b) Glomerulus

(c) Bowman’s capsule

(d) Ureter

Answer: (a) Tubule

25. Where is the dirty blood in our body filtered?

(a) Heart

(b) Lungs

(c) Ureter

(d) Kidneys

Answer: (d) Kidneys

26. The procedure used for cleaning the blood of a person by separating urea from it is called:

(a) osmosis

(b) filtration

(c) dialysis

(d) double circulation

Answer: (c) dialysis

27. Which is the correct sequence of body parts in the human alimentary canal?

(a) Mouth → stomach → small intestine → large intestine → oesophagus

(b) Mouth → oesophagus → stomach → small intestine → large intestine

(c) Mouth → stomach → oesophagus → smallintestine → large intestine

(d) Mouth → oesophagus → stomach → large intestine → small intestine

Answer: (b) Mouth → oesophagus → stomach → small intestine → large intestine

28. Identify the correct path of urine in the human body.

(a) Kidney → urinary bladder → urethra → ureter

(b) Urinary bladder → ureter → kidney → urethra

(c) Kidney → ureter → urethra → urinary bladder

(d) Kidney → ureter → urinary bladder → urethra

Answer: (d) Kidney → ureter → urinary bladder → urethra

Fill in the Blanks

1. The exit of food from the stomach is regulated by a ………. muscle.

Answer : 1. sphincter

2. ………. is the longest part of the alimentary canal.

Answer : 2. Small intestine

3. The process of breakdown of glucose, (a six-carbon molecule) into pyruvate, (a three-carbon molecule), takes place in the ………

Answer : 3. cytoplasm

4. ………. is the site of the complete digestion of carbohydrates, proteins and fats.

Answer : 4. Small intestine

5. Breaking of pyruvate using oxygen takes place in the ……….

Answer : 5. mitochondria

6. Rings of cartilage are present in the wind pipe to ensure that the ……….

Answer : 6. air-passage does not collapse

7. The blood has ………. cells which plug the leakage in the vessels by helping to clot the blood at the point of injury.

Answer : 7. platelet

8. ………. transports products of photosynthesis from the leaves to other parts of the plant.

Answer : 8. phloem