Class 10 Photosynthesis Mock Test (ICSE)

Topics in Photosynthesis

• Raw materials and products
• Light and dark reactions
• Structure of chloroplast
• Experiments on photosynthesis
• Adaptations of leaves
• Carbon cycle

Photosynthesis practice questions with answers

1. Q1Multiple choice·1 mark
   The ground substance of the chloroplast where enzyme-driven dark reactions (biosynthetic phase) occur is known as:

   1. (a)Thylakoid
   2. (b)Granum
   3. (c)Cristae
   4. (d)Stroma
   Show answer and step marks

   1. Correct option: (d) Stroma+1

   Answer: (d)
2. Q2Multiple choice·1 mark
   What are the primary raw materials required by green plants to carry out photosynthesis?

   1. (a)Chlorophyll and Sunlight
   2. (b)Glucose and Oxygen
   3. (c)Carbon dioxide and Water
   4. (d)Oxygen and Water
   Show answer and step marks

   1. Correct option: (c) Carbon dioxide and Water+1

   Answer: (c)
3. Q3Multiple choice·1 mark
   In the starch test experiment on a leaf, what is the specific purpose of boiling the decolourised leaf in hot water?

   1. (a)To dissolve the chlorophyll
   2. (b)To test for carbon dioxide absorption
   3. (c)To bleach the leaf white
   4. (d)To soften the brittle leaf tissue
   Show answer and step marks

   1. Correct option: (d) To soften the brittle leaf tissue+1

   Answer: (d)
4. Q4Multiple choice·1 mark
   During the photochemical phase of photosynthesis, the photolysis of water takes place in the:

   1. (a)Outer envelope of the chloroplast
   2. (b)Cytoplasm of the plant cell
   3. (c)Grana / Thylakoid membranes
   4. (d)Stroma of the chloroplast
   Show answer and step marks

   1. Correct option: (c) Grana / Thylakoid membranes+1

   Answer: (c)

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