Multiple choice

The site of photosynthesis in plants is

  1. Plastids

  2. Nucleus

  3. Mitochondria

  4. Endoplasmic Reticulum
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A Correct answer
Explanation

These are found only in plant cells and in certain protists (e.g. Euglena). There are two main types - chromoplasts and leucoplasts. The chromoplasts contain coloured pigment and occur in the cells exposed to sunlight. The leucoplasts are colourless and occur in the cells not exposed to light. The chromoplasts having light absorbing green pigment, the chlorophyll are called chloroplasts. The chloroplasts trap the radiant energy of sunlight and transform it into chemical energy of glucose using CO2 and H20. The process is called photosynthesis.

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