Welcome to Bodhiclasses, your learning partner for clear, concept-based science education. This question paper on Chapter 10: Life Processes in Plants has been designed to test your understanding with a mix of MCQs, short answers, and higher-order thinking questions. Practice well and boost your confidence!
Section A: Multiple Choice Questions (1 mark each)
- The food prepared during photosynthesis is stored in plants as:
a) Protein
b) Fat
c) Starch
d) Cellulose - The green pigment in leaves is called:
a) Hemoglobin
b) Chlorophyll
c) Xanthophyll
d) Cytoplasm - Which gas is released during photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen - Which tissue is responsible for transporting water in plants?
a) Phloem
b) Chloroplast
c) Xylem
d) Cortex - Stomata are present mainly on:
a) Roots
b) Flowers
c) Stems
d) Leaves - Which of the following is not required for photosynthesis?
a) Carbon dioxide
b) Water
c) Sunlight
d) Oxygen - The process by which plants make food is called:
a) Respiration
b) Germination
c) Photosynthesis
d) Fertilization - The energy released during respiration is used for:
a) Reproduction
b) Photosynthesis
c) Growth and development
d) Water transport - Which part of the plant is called the “food factory”?
a) Stem
b) Root
c) Flower
d) Leaf - The movement of food from leaves to other parts is carried out by:
a) Xylem
b) Phloem
c) Chlorophyll
d) Cambium
Chapter 10: Life Processes in Plants
Section B: One Mark Questions
- Name the pigment responsible for trapping sunlight in leaves.
- Write one raw material required for photosynthesis.
- Where in the plant does respiration occur?
- What is the by-product of photosynthesis?
- Define stomata.
- What is the role of xylem in a plant?
- What happens to glucose produced in photosynthesis?
- Mention any one gas involved in respiration.
- Name the vessels responsible for food transport in plants.
- Write the basic word equation for respiration.
Section C: Two Mark Questions
- Write any two differences between photosynthesis and respiration.
- Why are leaves broad and flat in shape?
- What happens to a plant kept in complete darkness for a week?
- Describe the role of carbon dioxide in photosynthesis.
- How does water reach the leaves from the roots?
- Why does iodine solution turn blue-black on a leaf?
- What will happen if stomata are blocked?
- How does sunlight help in food preparation in plants?
- Name the products of photosynthesis and their uses.
- Write the function of phloem and xylem in transport.
Chapter 10: Life Processes in Plants
Section D: Higher Order Thinking Skills (HOTS) – 3 Marks Each
- A student places two plants—one in sunlight and one in darkness—for 3 days. What differences will be observed in both plants? Which plant will pass the iodine test and why?
- If photosynthesis stopped on Earth, what would happen to life? Explain in two points.
- Why is it necessary for plants to respire even though they prepare their own food?
- A potato shows presence of starch. Explain how this starch reached the potato.
- Design a simple experiment to show that oxygen is released during photosynthesis
Answer Key – Life Processes in Plants Sample Paper
Section A – MCQs:
- c
- b
- a
- c
- d
- d
- c
- c
- d
- b
Section B – One Mark Questions:
11. Chlorophyll
12. Carbon dioxide
13. In all parts of the plant
14. Oxygen
15. Small pores on leaves for gas exchange
16. To carry water and minerals from roots
17. It is converted to starch and stored
18. Oxygen
19. Phloem
20. Glucose + Oxygen → Carbon dioxide + Water + Energy
Section C – Two Mark Questions:
21. Photosynthesis occurs in sunlight and produces glucose; respiration occurs anytime and releases energy from glucose.
22. To increase surface area for sunlight absorption.
23. The plant will become pale and weak; photosynthesis will not occur.
24. Carbon dioxide provides carbon for forming glucose.
25. Through xylem vessels.
26. Because starch is present in the leaf.
27. Gas exchange will be blocked, stopping photosynthesis and respiration.
28. It provides energy for converting CO₂ and water into glucose.
29. Glucose (food), Oxygen (released into air).
30. Xylem – water & minerals; Phloem – food from leaves.
Section D – HOTS:
31. The plant in sunlight will remain green and test positive for starch; the one in darkness will turn pale and fail the iodine test.
32. Oxygen would decrease, carbon dioxide would increase, and food chains would collapse.
33. Because respiration provides energy for plant functions.
34. Food is made in leaves and transported to the potato through phloem.
35. Place an aquatic plant in water under sunlight with an inverted test tube – observe bubbles collecting (oxygen).
