In oxygenic photosynthesis in plants, which set correctly lists the three main inputs (reactants) required to produce sugars?

• A. Carbon dioxide, water, and light energy
• B. Carbon dioxide, oxygen, and glucose
• C. Oxygen, water, and light energy
• D. Nitrogen gas, water, and light energy

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the process of oxygenic photosynthesis, which occurs in plants and involves converting light energy into chemical energy stored in sugars.
2. Step 2: Identify the main reactants required for photosynthesis. These are the substances that the plant takes in to produce sugars.
3. Step 3: Recall the general photosynthesis equation: \$6\,CO_2 + 6\,H_2O + light\ energy \rightarrow C_6H_{12}O_6 + 6\,O_2$, which shows carbon dioxide, water, and light energy as inputs.
4. Step 4: Recognize that oxygen is actually a product of photosynthesis, not a reactant, so options listing oxygen as an input are incorrect.
5. Step 5: Conclude that the correct set of inputs (reactants) for producing sugars in oxygenic photosynthesis is carbon dioxide, water, and light energy.