Which of these is a direct photosynthetic product?

Analyze the question: It asks for the direct product of photosynthesis, meaning the first, immediate product made in the process, not something formed afterward from it.

Explain the concept: Photosynthesis is summarized as:

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ (in the presence of light and chlorophyll)

The carbon dioxide and water are converted into glucose (a simple sugar) and oxygen. Glucose is the direct product of the process.

Go through the options:

• A. Fats: These are made later from glucose by metabolic conversion. Not direct.
• B. Glucose: This is the simple sugar made directly in the light-driven and Calvin cycle reactions. Direct product.
• C. Latex: This is a milky fluid in some plants (e.g., rubber trees) and is a secondary product. Not direct.
• D. Protein: Made from glucose plus mineral salts (nitrates), so it is not direct.
• E. Starch: This is formed when glucose molecules are joined together for storage. It is a product of glucose, so it is not direct. This is the common trap, because starch is what we test for in leaves with iodine, but it is only the stored form of the glucose made.

Answer: Glucose, which is option B.

Exam tip: Remember the order: Glucose → Starch (storage), and glucose → fats and proteins (with other nutrients). If the question says "direct" or "first product," pick glucose. If it says "stored form" or "tested in leaves," pick starch.