SSC Selection Post 2025 PYQ — Question 23

Correct Answer

Leaf

Explanation

The leaf is the primary site for photosynthesis in most plants. Leaves contain specialized structures called chloroplasts, which house chlorophyll, the pigment responsible for capturing light energy from the sun. Through the process of photosynthesis, plants convert light energy, water, and carbon dioxide into glucose, which serves as their food, and release oxygen as a byproduct.

Key Points

While leaves are the main site, some plants with modified structures, such as cacti, may perform photosynthesis in their stems. The process is essential for life on Earth as it provides the foundation for most food chains and maintains atmospheric oxygen levels. Stomata on the leaf surface facilitate the exchange of gases required for this process.

Important Questions and Answers

Question: What is the green pigment in leaves that captures sunlight?

Answer: Chlorophyll.

Question: What are the primary inputs required by a plant for photosynthesis?

Answer: Sunlight, water, and carbon dioxide.