Life Processes Class 10 MCQ with Answers

Welcome to biology life processes class 10 MCQ online test. In this online test, you would find the single choice type questions along with assertion reason type questions. This test is strictly according to the class 10 science syllabus as proposed by CBSE and NCERT books.

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Life Processes Class 10 MCQ Online Test

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General Instructions

Your test contains multiple-choice questions with only one answer-type question. There are a total of 20 questions
This is a 20 min test. Please make sure you complete it in the stipulated time
You can finish this test any time using the 'Submit' button.

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1. ASSERTION: Molecular movements are needed for life.
REASON: Body structures made up of these molecules need continuous repair and maintenance.

If both assertion and reason are CORRECT and the reason is the CORRECT explanation of the assertion.

If both assertion and reason are CORRECT, but the reason is NOT THE CORRECT explanation of the assertion.

If the assertion is CORRECT, but the reason is INCORRECT

If the assertion is INCORRECT, but the reason is CORRECT

If both assertion and reason are INCORRECT

2. Opening and closing of pores is a function performed by

Stomata

Chlorophyll

Chloroplast

Guard cells

3. ASSERTION: The inner lining of the small intestine has numerous finger-like projections called villi.
REASON: The villi increase the surface area for absorption.

If both assertion and reason are CORRECT and the reason is the CORRECT explanation of the assertion.

If both assertion and reason are CORRECT, but the reason is NOT THE CORRECT explanation of the assertion.

If the assertion is CORRECT, but the reason is INCORRECT

If the assertion is INCORRECT, but the reason is CORRECT

If both assertion and reason are INCORRECT

4. Main site of photosynthesis

Leaf

Stem

Chloroplast

Guard cells

5. The part of the digestive system where no digestion takes place is

ileum

stomach

mouth

oesophagus

6. Assertion: All proteins in our food are digested in small intestine only.
Reason: The protein-digesting enzymes are released onto small intestine.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Assertion is true but Reason is false

Assertion is false but Reason is true

Both Assertion and Reason are false

7. Choose the form in which most of the plants absorb nitrogen from the atmosphere ?

proteins

nitrates and nitrites

atmospheric nitrogen

amino acids

8. Bile juice is secreted by

Stomach

Pancreas

Small intestine

Liver

9. Lack of oxygen in muscles often leads to cramps among cricketers. This results due to

conversion of pyruvate to ethanol

conversion of pyruvate to glucose

non-conversion of glucose to pyruvate

conversion of pyruvate to lactic acid

10. Assertion: Veins have thin walls to collect blood from different organs.
Reason: Blood in veins are not under pressure.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

Assertion is true but Reason is false

Assertion is false but Reason is true

Both Assertion and Reason are false

11. Which process converts light energy to chemical energy ?

Respiration

photosynthesis

transpiration

transportation of water and minerals

12. A biochemical compound that readily combines with oxygen and distributes it throughout the human body is

water

urea

hemoglobin

acetylcholine

13. In amoeba, food is digested in the:

food vacuole

mitochondria

pseudopodia

chloroplast

14. Which element is used in the synthesis of proteins?

Hydrogen

Oxygen

Nitrogen

Carbon dioxide

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

Ethanol + Carbon dioxide + Energy

Lactic acid + Energy

Carbon dioxide + Water + Energy

Pyruvate

16. The mode of nutrition found in fungi is:

Parasitic nutrition

Holozoic nutrition

Autotrophic nutrition

Saprotrophic nutrition

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

Lactic acid + Energy

Carbon dioxide + Water + Energy

Ethanol + Carbon dioxide + Energy

Pyruvate

18. ASSERTION: In human beings, the respiratory pigment is haemoglobin.
REASON: It is a type of protein which has high-affinity carbon dioxide.

If both assertion and reason are CORRECT and the reason is the CORRECT explanation of the assertion.

If both assertion and reason are CORRECT, but the reason is NOT THE CORRECT explanation of the assertion.

If the assertion is CORRECT, but the reason is INCORRECT

If the assertion is INCORRECT, but the reason is CORRECT

If both assertion and reason are INCORRECT

19. A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains

complex proteins

simple proteins

fats

starch

20. The movement of food in phloem is called:

transpiration

translocation

respiration

evaporation

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