Photosynthesis is the process by which green plants produce their own carbohydrates and obtain energy.

Photosynthesis is the process by which green plants produce their own carbohydrates and obtain energy.

• A. A respiratory process that breaks down sugars
• B. The process by which green plants produce their own carbohydrates using light energy
• C. The absorption of water by roots
• D. The release of oxygen during night time

Answer: (B)

Photosynthesis is the process by which green plants use light energy to build the sugars they need for growth and energy. In this process, chlorophyll in the leaves captures light and powers a two-part system: first, light-driven reactions that capture light energy to make energy-rich molecules (like ATP and NADPH); then a dark set of reactions that use those molecules to convert carbon dioxide and water into glucose, a carbohydrate. Oxygen is released as a byproduct in this process. That’s why the best description is the one that states green plants produce their own carbohydrates using light energy. The other statements describe other plant processes or inputs. A respiratory process that breaks down sugars refers to cellular respiration, which releases energy by oxidizing carbohydrates, not producing them. The absorption of water by roots is essential for photosynthesis, but it’s not the definition of the process itself. Releasing oxygen at night isn’t accurate because photosynthesis needs light; at night plants mainly respire and do not produce oxygen.

Photosynthesis is the process by which green plants use light energy to build the sugars they need for growth and energy. In this process, chlorophyll in the leaves captures light and powers a two-part system: first, light-driven reactions that capture light energy to make energy-rich molecules (like ATP and NADPH); then a dark set of reactions that use those molecules to convert carbon dioxide and water into glucose, a carbohydrate. Oxygen is released as a byproduct in this process.

That’s why the best description is the one that states green plants produce their own carbohydrates using light energy. The other statements describe other plant processes or inputs. A respiratory process that breaks down sugars refers to cellular respiration, which releases energy by oxidizing carbohydrates, not producing them. The absorption of water by roots is essential for photosynthesis, but it’s not the definition of the process itself. Releasing oxygen at night isn’t accurate because photosynthesis needs light; at night plants mainly respire and do not produce oxygen.