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Which of the following statements with respect to Endoplasmic Reticulum is incorrect?
- a)SER is devoid of ribosomes
- b)In prokaryotes only RER are present
- c)SER are the sites for lipid synthesis
- d)RER has ribosomes attached to ER
Correct answer is option 'B'. Can you explain this answer?
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Which of the following statements with respect to Endoplasmic Reticulu...
Explanation:
Ribosomes on Endoplasmic Reticulum:
- Endoplasmic Reticulum (ER) can be divided into two types based on the presence or absence of ribosomes:
- Rough Endoplasmic Reticulum (RER): This type of ER has ribosomes attached to its surface, giving it a rough appearance.
- Smooth Endoplasmic Reticulum (SER): This type of ER is devoid of ribosomes, giving it a smooth appearance.
- Ribosomes on RER are involved in protein synthesis, while SER plays a role in lipid synthesis and detoxification.
Presence in Prokaryotes:
- It is incorrect to state that only RER is present in prokaryotes. Prokaryotic cells do not have membrane-bound organelles like ER. Instead, they have ribosomes floating freely in the cytoplasm for protein synthesis.
Therefore, the statement "In prokaryotes only RER are present" is incorrect as prokaryotes lack both RER and SER. The presence of ribosomes on the ER is a distinguishing feature between RER and SER in eukaryotic cells.
Ribosomes on Endoplasmic Reticulum:
- Endoplasmic Reticulum (ER) can be divided into two types based on the presence or absence of ribosomes:
- Rough Endoplasmic Reticulum (RER): This type of ER has ribosomes attached to its surface, giving it a rough appearance.
- Smooth Endoplasmic Reticulum (SER): This type of ER is devoid of ribosomes, giving it a smooth appearance.
- Ribosomes on RER are involved in protein synthesis, while SER plays a role in lipid synthesis and detoxification.
Presence in Prokaryotes:
- It is incorrect to state that only RER is present in prokaryotes. Prokaryotic cells do not have membrane-bound organelles like ER. Instead, they have ribosomes floating freely in the cytoplasm for protein synthesis.
Therefore, the statement "In prokaryotes only RER are present" is incorrect as prokaryotes lack both RER and SER. The presence of ribosomes on the ER is a distinguishing feature between RER and SER in eukaryotic cells.
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Which of the following statements with respect to Endoplasmic Reticulu...
The statement is incorrect because prokaryotes, which are single-celled organisms without a nucleus, do not possess membrane-bound organelles like the ER. The Endoplasmic Reticulum is primarily found in eukaryotic cells, which include animals, plants, fungi, and protists.
Therefore, the correct answer is (B) In prokaryotes only RER are present.
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Which of the following statements with respect to Endoplasmic Reticulum is incorrect?a)SER is devoid of ribosomesb)In prokaryotes only RER are presentc)SER are the sites for lipid synthesisd)RER has ribosomes attached to ERCorrect answer is option 'B'. Can you explain this answer?
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