Endoplasmic Reticulum


 
 
Concept Explanation
 

Endoplasmic Reticulum

Endoplasmic Reticulum (ER)

The endoplasmic reticulum is a network of tube-like structures running through the cytoplasm. Some parts are connected to the nuclear membrane, while others are connected to the cell membrane. The Endoplasmic Reticulum membrane is similar in structure to plasma membrane. It occurs in Three forms; cisternae, vesicles and tubules. It is of two types: Rough and Smooth Endoplasmic Reticulum.

  • Rough Endoplasmic Reticulum (RER) : It contains ribosomal substances because of which its surface is rough. The ribosomes are the sites of protein synthesis. RER s mainly formed of cisternae.

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    Sample Questions
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    Question : 1

    What part of the cell does serves as the intracellular  highway?

    Right Option : A
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    Question : 2

    Which of the following are correct ?

    (a) The function of endoplasmic reticulum gives internal support to the cytoplasm.

    (b) Smooth endoplasmic reticulum helps to manufacture protein . 

    Right Option : A
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    Question : 3

    Which of the following are correct ?

    (a) The endoplasmic reticulum is a network of tube-like structures running through the cytoplasm.

    (b) The function of smooth endoplasmic reticulum plays a crucial role in detoxifying many poisons and drugs.

    Right Option : C
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