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Question

Which of the following is found in plant cells but not animal cells?


A

Cell wall

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B

Nucleus

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C

Endoplasmic reticulum

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D

Mitochondria

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Solution

The correct option is A

Cell wall


The correct option is A

Explanation of the correct option:

  1. A plant cell is surrounded by a non-living cell wall.
  2. The plant cell wall is an outer layer of the cell and is mainly composed of cellulose.
  3. It is present in plants but absent in animals.
  4. Cellulose is a polysaccharide type of carbohydrate consisting of several hundred to many thousands of units of glucose.
  5. Around 6000 molecules of glucose contribute to preparing cellulose.
  6. Cellulose is very an important structural component of the primary cell wall of green plants and many forms of algae.
  7. The cell wall provides a definite shape and rigidity to the plant cell.

Explanation of the incorrect option:

Option B:

  1. The nucleus is present in both plant and animal cells.
  2. It regulates all the activities of the cell.

Option C:

  1. The endoplasmic reticulum is present in both plant and animal cells.
  2. The endoplasmic reticulum (ER) helps in the synthesis of protein and phospholipids.

Option D:

  1. Mitochondria is present in both plants and animal cells.
  2. Mitochondria are the sites for cellular respiration and provide energy to the cell.

Final answer: Cell wall is found in plant cells, but not animal cells.


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