Biology Cell Part 15 (Endoplasmic Reticulum) Class 8 VIII | Summary and Q&A

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August 20, 2015
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Biology Cell Part 15 (Endoplasmic Reticulum) Class 8 VIII

TL;DR

Endoplasmic reticulum (ER) is a network of membrane tubules inside the cytoplasm of a cell, with two types - rough ER and smooth ER. It plays a vital role in protein and lipid synthesis, transportation of materials, and detoxification.

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Questions & Answers

Q: What is the function of the rough endoplasmic reticulum?

The rough endoplasmic reticulum is involved in protein synthesis. Ribosomes present on its surface synthesize proteins, which are then transported to various parts of the cell.

Q: What is the function of the smooth endoplasmic reticulum?

The smooth endoplasmic reticulum is responsible for lipid synthesis. It also aids in detoxification processes and plays a role in hormone and enzyme production.

Q: How does endoplasmic reticulum contribute to the transportation of materials within the cell?

Endoplasmic reticulum acts as a channel for transporting substances within the cell. It receives materials from the nucleus through nuclear pores and sends them to different parts of the cell for various functions.

Q: What role does endoplasmic reticulum play in detoxification?

The smooth endoplasmic reticulum helps in detoxifying poisons and drugs. It increases its surface area to enhance the detoxification process and returns to its normal size once detoxification is complete.

Summary & Key Takeaways

  • Endoplasmic reticulum (ER) is a network of membrane tubules inside the cytoplasm of cells, with rough ER and smooth ER being the two types.

  • Rough ER contains ribosomes on its surface and is involved in protein synthesis, while smooth ER lacks ribosomes and is involved in lipid synthesis.

  • ER plays a crucial role in the production of proteins and lipids, transportation of materials within the cell, and detoxification processes.

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