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Question

What happens to sunlight in photosynthesis?


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Solution

Photosynthesis:

  1. Photosynthesis is the conversion of light energy by phototrophs into chemical energy, which is then utilised to power cellular processes.
  2. Sugars, which are formed from water and carbon dioxide, are used to store chemical energy.
  3. Photosynthesis occurs at the cellular level in cell organelles known as chloroplasts.
  4. These organelles carry a green pigment called chlorophyll, which is responsible for the leaves' distinctive green colour.

Stages of photosynthesis:

The photosynthesis process is divided into two stages:

  1. Light-dependent reaction: The light reaction is the photosynthetic process that turns solar energy into chemical energy in the form of NADPH and ATP.
  2. Light-independent or dark response: The dark reaction is the second step of photosynthesis that occurs in the chloroplast stroma.

During photosynthesis:

  1. Photosystems are membrane-bound sac-like structures found inside the thylakoid that works by collecting light.
  2. Large complexes of pigment and protein molecules are found within plant cells and play a fundamental part in the process of light reactions of photosynthesis.

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