Which of the following best describes the primary purpose of photosynthesis in plants?

• A. To convert light energy into chemical energy stored in glucose
• B. To absorb oxygen and release carbon dioxide
• C. To break down glucose and release energy for cellular activities
• D. To produce ATP directly from sunlight without any intermediate molecules

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by understanding the concept of photosynthesis. Photosynthesis is a process used by plants, algae, and some bacteria to convert light energy into chemical energy stored in glucose molecules.
2. Step 2: Recall the key components involved in photosynthesis. It occurs in the chloroplasts of plant cells and involves the absorption of light energy by chlorophyll pigments.
3. Step 3: Recognize the primary purpose of photosynthesis. The light energy absorbed is used to convert carbon dioxide (CO₂) and water (H₂O) into glucose (C₆H₁₂O₆) and oxygen (O₂). This process stores energy in the chemical bonds of glucose.
4. Step 4: Eliminate incorrect options. Photosynthesis does not absorb oxygen and release carbon dioxide (this is respiration), nor does it directly produce ATP from sunlight without intermediate molecules. It also does not break down glucose; instead, it synthesizes glucose.
5. Step 5: Conclude that the correct answer is the option describing the conversion of light energy into chemical energy stored in glucose, as this aligns with the primary purpose of photosynthesis.