10th LBA | Life Processes

MG SCHOOL SCIENCE

UNIT TEST QUESTION PAPER

CLASS 10 – SCIENCE

CHAPTER 5: LIFE PROCESSES

Learning Outcome Based Assessment (LBA)

Maximum Marks: 25

Time: 1 Hour

Name: __________________

Register No.: ____________

Date: __________________

Class: 10th Standard

GENERAL INSTRUCTIONS:

1. All questions are compulsory.
2. Write answers neatly and clearly.
3. Choose the correct answer for MCQs.
4. Draw neat, labelled diagrams wherever necessary.
5. Marks are indicated against each section.

SECTION A – MULTIPLE CHOICE QUESTIONS (5 × 1 = 5 Marks)

1. The place where carbohydrates, proteins and fats are completely digested is:

1 Mark

A. Stomach B. Large intestine C. Small intestine D. Liver

2. The blood vessels that carry blood from all parts of the human body to the heart are:

1 Mark

A. Arteries B. Capillaries C. Pulmonary arteries D. Veins

3. The transport of soluble photosynthesis products in plants is called:

1 Mark

A. Evaporation B. Osmosis C. Diffusion D. Translocation

4. The site where pyruvate breaks down in the presence of oxygen is:

1 Mark

A. Cytoplasm B. Mitochondria C. Chloroplast D. Nucleus

5. The important function of stomata is:

1 Mark

A. Exchange of gases B. Transport of water and food C. Food preparation D. Creating osmotic pressure

SECTION B – ONE MARK QUESTIONS (4 × 1 = 4 Marks)

6. Under which situation is lactic acid produced in muscle cells?

1 Mark

7. Name the products of anaerobic respiration in yeast.

1 Mark

8. What are the finger-like structures present in the small intestine called?

1 Mark

9. Name the two conducting tissues responsible for transportation in plants.

1 Mark

SECTION C – TWO MARK QUESTIONS (3 × 2 = 6 Marks)

10. Write any two differences between arteries and veins.

2 Marks

11. Why is the respiration rate of aquatic animals faster than that of terrestrial animals? Give reasons.

2 Marks

12. What is the importance of double circulation in human beings?

2 Marks

SECTION D – THREE MARK QUESTIONS (2 × 3 = 6 Marks)

13. Explain how water is transported to the higher parts of a plant.

3 Marks

14. Explain the structure and function of a nephron.

3 Marks

SECTION E – FOUR MARK QUESTION (1 × 4 = 4 Marks)

15. Answer the following:

4 Marks

a) What is anaerobic respiration? (1 Mark)

b) Name the products produced during anaerobic respiration in yeast. (1 Mark)

c) What is double circulation? (1 Mark)

d) How is double circulation useful in birds and mammals? (1 Mark)

BEST OF LUCK!
MG SCHOOL SCIENCE

ANSWER KEY – LIFE PROCESSES (25 MARKS)

SECTION A – MCQ ANSWERS (5 Marks)

1. C – Small intestine.

2. D – Veins.

3. D – Translocation.

4. B – Mitochondria.

5. A – Exchange of gases.

SECTION B – ONE MARK ANSWERS (4 Marks)

6. Lactic acid is produced when there is a lack of oxygen in muscle cells during vigorous activity.

7. Ethanol and carbon dioxide.

8. Villi.

9. Xylem and phloem.

SECTION C – TWO MARK ANSWERS (6 Marks)

10. Differences between arteries and veins:

Arteries	Veins
Carry blood away from the heart.	Carry blood towards the heart.
Generally have thick, elastic walls.	Generally have thin walls and valves.

Marking: 1 mark for each correct difference.

11. Reason for faster respiration in aquatic animals:

• The amount of oxygen dissolved in water is much lower than the amount of oxygen in air.
• Therefore, aquatic animals have to breathe faster to obtain sufficient oxygen.

Marking: 1 mark for each point.

12. Importance of double circulation:

• Blood passes through the heart twice during one complete cycle of circulation.
• It prevents the mixing of oxygenated and deoxygenated blood and ensures an efficient oxygen supply to the body.

Marking: 1 mark for each point.

SECTION D – THREE MARK ANSWERS (6 Marks)

13. Transportation of water in plants:

• Water and minerals are absorbed from the soil by root hairs.
• They are transported upwards through the xylem tissue.
• Transpiration creates a suction pull that helps water move to the higher parts of the plant. Root pressure also contributes.

Marking: 1 mark for each correct point.

14. Structure and function of nephron:

• Nephron is the structural and functional unit of the kidney.
• It consists of a glomerulus enclosed by Bowman's capsule and a long tubular structure.
• Blood is filtered in the glomerulus. Useful substances are selectively reabsorbed, and the remaining waste forms urine.

Marking: 1 mark for each correct point.

SECTION E – FOUR MARK ANSWER (4 Marks)

15 (a). What is anaerobic respiration?

It is the breakdown of glucose in the absence of oxygen to release energy.

1 Mark

(b). Products of anaerobic respiration in yeast:

Ethanol and carbon dioxide, along with the release of energy.

1 Mark

(c). What is double circulation?

It is the process in which blood passes through the heart twice during one complete cycle of circulation.

1 Mark

(d). Use of double circulation in birds and mammals:

It keeps oxygenated and deoxygenated blood separate and ensures an efficient oxygen supply, supporting their high energy requirements.

1 Mark

TOTAL: 25 MARKS
Prepared for Class 10 Science – Chapter 5: Life Processes.
MG SCHOOL SCIENCE