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Rough Endoplasmic Reticulum Structure and Function

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Rough Endoplasmic Reticulum Structure and Function

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Questions and Answers

What characterizes the rough endoplasmic reticulum (RER)?

Absence of membrane sheets called cisternae

Lack of ribosomes in its structure

Presence of membrane-bound ribosomes (correct)

Synthesis of lipids instead of proteins

Why are ribosomes not a stable part of the RER's structure?

They are permanent fixtures of the membrane

They do not play a role in protein synthesis

They are constantly being bound and released from the membrane (correct)

They are only found in other organelles

What is the main function of the rough endoplasmic reticulum in cells?

Generating ATP for energy

Assisting with cell division

Storing genetic material

Producing secreted proteins (correct)

What distinguishes the RER morphologically?

Flattened-like membrane sheets called cisternae Signup and view all the answers

Which process involves separating very fine insoluble solids from a liquid?

Churning Signup and view all the answers

In which process are grains separated from their stalks by beating them?

Threshing Signup and view all the answers

Which method is used to manually separate stones from grains of rice?

Handpicking Signup and view all the answers

What is the purpose of churning as described in the text?

Separate very fine insoluble solids from a liquid Signup and view all the answers

In the context of winnowing, what happens to the lighter solids (husks) when separated from the heavier solids (grains)?

They are carried by wind and form a separate heap Signup and view all the answers

How does handpicking help in distinguishing a stone from a grain of rice?

By singling out stones that are noticeably distinct from rice grains Signup and view all the answers