Question

Which of the following raw material is available in the air for photosynthesis?

• A. Oxygen
• B. Carbon dioxide
• C. Nitrogen
• D. Hydrogen

Answer 1

The correct option is B

Carbon dioxide

The correct option is B

Explanation of the correct option:

1. Photosynthesis is the process of making food.
2. It needs raw materials such as carbon dioxide, water, and sunlight.
3. Photosynthesis occurs in the leaves by chlorophyll pigments.

The explanation of the incorrect option:

Option A:

1. Oxygen is needed for respiration in organisms.
2. It is available in the atmosphere.
3. Photosynthesis generates oxygen as output with glucose.

Option C:

1. Nitrogen is an essential element for plant growth.
2. It is present in chlorophyll and helps in the growth of plants.
3. Nitrogen-fixing soil organisms are linked to legume roots.
4. They capture atmospheric nitrogen and deliver it to the plant.

Option D:

1. Hydrogen molecules are necessary for making glucose.
2. It is present in almost all compounds.
3. Hydrogen ions are essential for assisting proton gradients.
4. It is driving the electron transport chain in photosynthesis.

Final answer: Carbon dioxide is raw material is available in the air for photosynthesis