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. The autotrophic mode of nutrition requires

carbon dioxide and water

chlorophyll

sunlight

all of these

2. ASSERTION: Pyruvate is a six-carbon molecule.
REASON: It is prepared in the cytoplasm as the first step to cellular respiration.

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

3. The mode of nutrition found in fungi is:

Parasitic nutrition

Holozoic nutrition

Autotrophic nutrition

Saprotrophic nutrition

4. The extracellular fluid released from the capillaries is:

serum

plasma

lymph

mucus

5. Proteins after digestion are converted into

Carbohydrates

Small globules

Amino acids

starch

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

Starch breaking down into sugars

Proteins breaking down into amino acids

Absorption of vitamins

Fats breaking down into fatty acids and glycerol

7. ASSERTION: The opening and closing of the pore is a function of the guard cells.
REASON: Stomatal pores are the site for exchange of gases by diffusion.

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

8. ASSERTION: The purpose of making urine is to filter out undigested food from intestine.
REASON: Kidneys filter the waste and produce urine.

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

9. 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

10. The movement of food in phloem is called:

transpiration

translocation

respiration

evaporation

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

proteins

nitrates and nitrites

atmospheric nitrogen

amino acids

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

Pepsin

Trypsin

Amylase

Lipase

13. Choose the event that does not occur in photosynthesis?

Absorption of light energy by chlorophyll

Reduction of carbon dioxide to carbohydrates

Oxidation of carbon to carbon dioxide

Conversion of light energy to chemical energy

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

water

urea

hemoglobin

acetylcholine

15. 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

16. Which process converts light energy to chemical energy ?

Respiration

photosynthesis

transpiration

transportation of water and minerals

17. The internal (cellular) energy reservoir in autotrophs is:

glycogen

protein

starch

fatty acid

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

translocation

transpiration

peristaltic movement

digestion

19. Main site of photosynthesis

Leaf

Stem

Chloroplast

Guard cells

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

Mouth → stomach → small intestine → large intestine → oesophagus

Mouth → oesophagus → stomach → small intestine → large intestine

Mouth → stomach → oesophagus → smallintestine → large intestine

Mouth → oesophagus → stomach → large intestine → small intestine

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