Question

Which of the following is not an ingredient for photosynthesis?

• A. Water
• B. Carbon dioxide
• C. Pigments
• D. Oxygen

Answer 1

The correct option is D Oxygen

The process by which plants synthesize sugars in the presence of sunlight is called photosynthesis. This process requires chlorophyll, sunlight, water, carbon dioxide to yield glucose and oxygen molecules. Thus, oxygen is a byproduct of photosynthesis and not an ingredient.
$6C{O}_2+12H_{2}O\underset{\text{Pigments}}{\overset{\text{Light}}{\to }}{C}_6{H}_{12}{O}_6+6H_{2}O+6O_2$