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ICSE Class 7 Biology Question 5 of 16

Photosynthesis and Respiration — Question 7

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Question 3

The figure given below represents a process in plants. Study the same and answer the following questions :

The figure given below represents a process in plants. Study the same and answer the following questions : Concise Biology Solutions ICSE Class 7.
  1. Identify the process and define it.
  2. Write balanced equation depicting the entire process.
  3. Name the organelle and pigment responsible for the process.
  4. Mention two by-products of the process.
  5. What is the significance of the process ? State two points.
Answer

  1. The given figure shows the process of Photosynthesis.
    Photosynthesis is the process by which green plants capture solar energy and use it to convert carbon dioxide and water into simple sugars and oxygen.

  2. The balanced equation depicting Photosynthesis is given below:

Carbon dioxide + Water →SunlightChlorophyll\xrightarrow[\text{Sunlight}]{\text{Chlorophyll}} Glucose + Oxygen

  1. The chloroplast is the organelle, and chlorophyll is the pigment, responsible for photosynthesis in plant cells. Chloroplasts contain chlorophyll, which captures light energy to convert carbon dioxide and water into glucose and oxygen.

  2. Two by-products of Photosynthesis are Glucose (C6 H12 O6) and Oxygen.

  3. Photosynthesis is significant due to following reasons:

    1. Food for all — Plants prepare their own food by photosynthesis, and the plants in turn are eaten by the animals.
    2. Oxygen for respiration — All the free oxygen in the atmospheric air is the result of photosynthesis.