Which of the following statements about the endoplasmic reticulum is false?

Cells that produce a lot of protein for export are packed with ER.

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Carbohydrates are added to proteins to produce glycoproteins in the ER.

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Ribosomes are located within the lumen of the Rough ER.

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ER provides a pathway for the distribution of nuclear material from one cell to another.

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Solution

The correct option is C Cells that produce a lot of protein for export are packed with ER.
The transitional endoplasmic reticulum is the region where the transport vesicles that contain lipids and protein components made in the endoplasmic reticulum separate from it and move into the Golgi apparatus. Hence cells that produce a lot of protein for export are not packed with ER but with transport vesicles. Thus the correct answer is option A.

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Question 10
Find out the correct sentence.

(a) Enzymes packed in the Lysosomes are synthesized by the RER (rough endoplasmic reticulum).
(b) Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipids and proteins respectively.
(c) The endoplasmic reticulum is related to the destruction of plasma membrane.
(d) Nucleoid is present inside the nucleoplasm of the eukaryotic nucleus.

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Question 12
The proteins and lipids, essential for building the cell membrane, are manufactured by

(a) Rough endoplasmic reticulum
(b) Golgi apparatus
(c) Plasma membrane
(d) Mitochondria

Q. Consider the following statements
(a) Lysosomes keep the cells clean by digesting foreign materials.
(b) Ribosomes are present in eukaryotic cells only.
(c) The ER (endoplasmic reticulum) functions both as passageway for intracellular transport and as a manufacturing surface.
Which of the above statements are correct?

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