We have given Class 10 Multiple Choice Questions of Life Processes with a detailed clarification of answers. MCQ Questions make it simple to get a handle on the top to the bottom concept of the question. 

Check MCQ Questions for Class 10 Science Life Processes to prepare for the objective type question that will appear in Board Exams.

Practice Class 10 Science MCQ Questions of Life Processes

1. The filtration units of kidneys are called –

(a) Ureter
(b) Urethra
(c) Neurons
(d) nephrons.

2. The mode of nutrition found in fungi is:

(a) Parasitic nutrition
(b) Holozoic nutrition
(c) Autotrophic nutrition
(d) Saprotrophic nutrition

3. 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

4. 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

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

(a) chloroplast
(b) mitochondria
(c) cytoplasm
(d) protoplasm

6. Main site of photosynthesis

(a) Leaf
(b) Stem
(c) Chloroplast
(d) Guard cells

7. One cell-thick vessels are called

(a) Arteries
(b) Veins
(c) Capillaries
(d) Pulmonary artery

8. Blood consist of what fluid medium?

(a) Lymph
(b) Platelets
(c) Plasma
(d) All of these

9. 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

10. The vein which brings clean blood from the lungs into the heart is known as:

(a) Pulmonary vein
(b) Hepatic vein
(c) Superior vena cava
(d) Pulmonary artery

11. Select the correct statement -

(a) Hetrotrophs make their food
(b) Heterotrophs utilize solar energy to make food
(c) Heterotrophs do not make their own food
(d) Heterotrophs are capable of converting carbon dioxide and water into carbohydrates

12. Which out of them is raw material for photosynthesis?

(a) carbon dioxide
(b) water
(c) oxygen
(d) all

13. Which of these is the simplest form of food?

(a) rice
(b) wheat
(c) Butter
(d) Glucose

14. The enzyme responsible for the digestion of proteins in the small intestine is:

(a) Pepsin
(b) Trypsin
(c) Amylase
(d) Lipase

15. The back flow of blood during the pumping of blood by heart is prevented by:

(a) Walls of ventncles
(b) Walls of atrium
(c) Valves in heart
(d) Walls between atria and ventricles

16. The process of digestion is completed by:

(a) Intestinal juice
(b) trypsin
(c) bile juice
(d) pepsin

17. The process of diffusion of solvent particles from the region of less solute concentration to a region of high solute concentration through semi-permeable membrane is known as

(a) Diffusion
(b) Osmosis
(c) Translocation
(d) Transpiration

18. Which of the following are energy foods?

(a) Carbohydrates and fats
(b) Proteins and mineral salts
(c) Vitamins and minerals
(d) Water and roughage

19. The largest gland in human body is:

(a) liver
(b) gastric glands
(c) pancreas
(d) salivary glands.

20. The excretory unit of the human excretory system is known as:

(a) Nephridia
(b) Neuron
(c) Nephron
(d) kidneys

Answer key

1. (d) nephrons
2. (d) Saprotrophic nutrition
3. (a) Stomach and pancreas

Explanation: Stomach secretes the enzyme pepsin and pancreas produces trypsin. Both of them breakdown protein.
4. (a) Mucus

Explanation: Mucus is a viscous secretion that protects the inner lining of the stomach from the action of HCl.
5. (a) chloroplast
6. (c) Chloroplast
7. (c) Capillaries
8. (c) Plasma
9. (d) Lactic acid

Explanation: The build-up of lactic acid in our muscles while running (less oxygen conditions) causes cramps.
10. (a) Pulmonary vein

Explanation: The pulmonary vein is responsible for bringing oxygenated and pure blood into the heart.
11. (c) Heterotrophs do not make their own food
12. (d) all
13. (d) Glucose
14. (b) Trypsin
15. (c) Valves in heart
16. (a) Intestinal juice
17. (b) Osmosis

Explanation: The diffusion of solvent particles from a region of less concentration to high concentration (concentration gradient) through a semi permeable membrane is called osmosis.
18. (a) Carbohydrates and fats
19. (a) liver
20. (c) Nephron

Explanation: Each kidney has large numbers of filtration units called nephrons.

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