Question Paper
Class / Subject: Class 10 (ICSE) · Biology
Chapter: Chapter 6 — Chapter 6: Photosynthesis
Time Allowed: 32 minutes
Max Marks: 16
1. What is the overall photosynthesis equation? [1]
(A) 6CO2+6H2O+light→C6H12O6+6O2
(B) 6O2+6H2O→C6H12O6
(C) CO2+H2O→O2 only
(D) No fixed equation exists
2. Where does photosynthesis mainly occur? [1]
(A) Chloroplasts
(B) Mitochondria
(C) Nucleus
(D) Ribosomes
3. What pigment is essential for photosynthesis? [1]
(A) Chlorophyll
(B) Melanin
(C) Haemoglobin
(D) Keratin
4. Where does the light reaction occur? [1]
(A) Thylakoid membranes
(B) The stroma
(C) The nucleus
(D) The cell wall
5. What does the light reaction produce? [1]
(A) ATP, NADPH, and oxygen
(B) Only glucose
(C) Only carbon dioxide
(D) Only water
6. Where does the dark reaction (Calvin cycle) occur? [1]
(A) The stroma
(B) Thylakoid membranes
(C) The nucleus
(D) The cell wall
7. What does the dark reaction produce? [1]
(A) Glucose
(B) Oxygen directly
(C) Water only
(D) Carbon dioxide only
8. What factors can limit photosynthesis rate? [1]
(A) Light, CO2 concentration, temperature
(B) Only water availability
(C) Only soil type
(D) Only plant colour
9. What is the overall photosynthesis equation? [1]
(A) 6CO2+6H2O+light→C6H12O6+6O2
(B) 6O2+6H2O→C6H12O6
(C) CO2+H2O→O2 only
(D) No fixed equation exists
10. Where does photosynthesis mainly occur? [1]
(A) Chloroplasts
(B) Mitochondria
(C) Nucleus
(D) Ribosomes
11. What pigment is essential for photosynthesis? [1]
(A) Chlorophyll
(B) Melanin
(C) Haemoglobin
(D) Keratin
12. Where does the light reaction occur? [1]
(A) Thylakoid membranes
(B) The stroma
(C) The nucleus
(D) The cell wall
13. What does the light reaction produce? [1]
(A) ATP, NADPH, and oxygen
(B) Only glucose
(C) Only carbon dioxide
(D) Only water
14. Where does the dark reaction (Calvin cycle) occur? [1]
(A) The stroma
(B) Thylakoid membranes
(C) The nucleus
(D) The cell wall
15. What does the dark reaction produce? [1]
(A) Glucose
(B) Oxygen directly
(C) Water only
(D) Carbon dioxide only
16. What factors can limit photosynthesis rate? [1]
(A) Light, CO2 concentration, temperature
(B) Only water availability
(C) Only soil type
(D) Only plant colour