Autotrophic Nutrition MCQs:
1. Which of the following organisms carry out autotrophic nutrition?
A. Plants
B. Animals
C. Fungi
D. Protists
Answer: A. Plants
2. What is the primary source of energy for autotrophic organisms?
A. Sunlight
B. Soil
C. Water
D. Air
Answer: A. Sunlight
3. Which pigment is responsible for capturing sunlight in photosynthesis?
A. Chlorophyll
B. Carotene
C. Xanthophyll
D. Anthocyanin
Answer: A. Chlorophyll
4. Where does photosynthesis take place in a plant cell?
A. Mitochondria
B. Golgi apparatus
C. Chloroplasts
D. Nucleus
Answer: C. Chloroplasts
5. Which of the following is a product of photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Water
D. Glucose
Answer: D. Glucose
6. What is the process by which autotrophic organisms convert light energy into chemical energy?
A. Respiration
B. Transpiration
C. Photosynthesis
D. Fermentation
Answer: C. Photosynthesis
7. Which of the following is not required for photosynthesis?
A. Carbon dioxide
B. Water
C. Oxygen
D. Chlorophyll
Answer: C. Oxygen
8. Which organelle is known as the "powerhouse" of the cell and is involved in photosynthesis?
A. Nucleus
B. Mitochondria
C. Endoplasmic reticulum
D. Ribosomes
Answer: B. Mitochondria
9. What is the chemical equation for photosynthesis?
A. CO2 + H2O -> C6H12O6 + O2
B. C6H12O6 + O2 -> CO2 + H2O
C. O2 + H2O -> CO2 + C6H12O6
D. C6H12O6 + CO2 -> H2O + O2
Answer: A. CO2 + H2O -> C6H12O6 + O2
10. Which of the following is a key factor affecting the rate of photosynthesis?
A. Temperature
B. Humidity
C. Wind speed
D. Soil pH
Answer: A. Temperature


Autotrophic Nutrition is a mode of nutrition in which organisms can synthesize their own organic molecules from inorganic sources like carbon dioxide and water, using sunlight as the primary source of energy. This process is mainly carried out by plants, algae, and some bacteria. Here are some key points related to autotrophic nutrition:
- Autotrophic organisms use chlorophyll, a