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Which among the following is incorrect about endoplasmic reticulum?
- a)These are complex network of membrane bounded tubules
- b)They are classified as smooth and rough endoplasmic reticulum
- c)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other end
- d)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesis
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which among the following is incorrect about endoplasmic reticulum?a)T...
The correct answer is option 'D': Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as a site of protein synthesis.
Explanation:
The endoplasmic reticulum (ER) is a complex network of membrane-bound tubules found in eukaryotic cells. It plays crucial roles in protein synthesis, lipid metabolism, and calcium storage. The ER is classified into two types based on its appearance and function: smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER).
1. Smooth endoplasmic reticulum (SER):
- The smooth endoplasmic reticulum lacks ribosomes on its surface and appears smooth under the microscope.
- It is involved in various metabolic processes, including lipid synthesis, detoxification of drugs and toxins, carbohydrate metabolism, and calcium ion storage.
- SER is abundant in cells that specialize in lipid metabolism, such as liver cells and cells of the endocrine system.
2. Rough endoplasmic reticulum (RER):
- The rough endoplasmic reticulum is studded with ribosomes on its surface, giving it a rough appearance.
- It is responsible for the synthesis, folding, and modification of proteins. Ribosomes attached to the RER synthesize proteins that are destined for secretion, insertion into membranes, or transport to other organelles.
- RER is interconnected with the nuclear membrane at one end and the Golgi apparatus on the other end, forming a continuous network.
In the given options, option 'D' is incorrect because smooth endoplasmic reticulum (SER) does not have ribosomes attached to its surface and it is not involved in protein synthesis. Protein synthesis primarily occurs on the ribosomes attached to the rough endoplasmic reticulum (RER). The RER acts as a site for protein synthesis, whereas the SER is involved in other metabolic functions as mentioned earlier.
Hence, option 'D' is the correct answer as it provides incorrect information about the smooth endoplasmic reticulum.
Explanation:
The endoplasmic reticulum (ER) is a complex network of membrane-bound tubules found in eukaryotic cells. It plays crucial roles in protein synthesis, lipid metabolism, and calcium storage. The ER is classified into two types based on its appearance and function: smooth endoplasmic reticulum (SER) and rough endoplasmic reticulum (RER).
1. Smooth endoplasmic reticulum (SER):
- The smooth endoplasmic reticulum lacks ribosomes on its surface and appears smooth under the microscope.
- It is involved in various metabolic processes, including lipid synthesis, detoxification of drugs and toxins, carbohydrate metabolism, and calcium ion storage.
- SER is abundant in cells that specialize in lipid metabolism, such as liver cells and cells of the endocrine system.
2. Rough endoplasmic reticulum (RER):
- The rough endoplasmic reticulum is studded with ribosomes on its surface, giving it a rough appearance.
- It is responsible for the synthesis, folding, and modification of proteins. Ribosomes attached to the RER synthesize proteins that are destined for secretion, insertion into membranes, or transport to other organelles.
- RER is interconnected with the nuclear membrane at one end and the Golgi apparatus on the other end, forming a continuous network.
In the given options, option 'D' is incorrect because smooth endoplasmic reticulum (SER) does not have ribosomes attached to its surface and it is not involved in protein synthesis. Protein synthesis primarily occurs on the ribosomes attached to the rough endoplasmic reticulum (RER). The RER acts as a site for protein synthesis, whereas the SER is involved in other metabolic functions as mentioned earlier.
Hence, option 'D' is the correct answer as it provides incorrect information about the smooth endoplasmic reticulum.
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Community Answer
Which among the following is incorrect about endoplasmic reticulum?a)T...
- Endoplasmic reticulum is a complex network of membrane bounded tubules.
- They are classified as smooth and rough endoplasmic reticulum.
- Rough endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesis.
- Rough endoplasmic reticulum is connected by nuclear membrane at one end and Golgi apparatus on the other end.
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Which among the following is incorrect about endoplasmic reticulum?a)These are complex network of membrane bounded tubulesb)They are classified as smooth and rough endoplasmic reticulumc)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other endd)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesisCorrect answer is option 'D'. Can you explain this answer?
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Which among the following is incorrect about endoplasmic reticulum?a)These are complex network of membrane bounded tubulesb)They are classified as smooth and rough endoplasmic reticulumc)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other endd)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesisCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which among the following is incorrect about endoplasmic reticulum?a)These are complex network of membrane bounded tubulesb)They are classified as smooth and rough endoplasmic reticulumc)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other endd)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesisCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which among the following is incorrect about endoplasmic reticulum?a)These are complex network of membrane bounded tubulesb)They are classified as smooth and rough endoplasmic reticulumc)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other endd)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesisCorrect answer is option 'D'. Can you explain this answer?.
Which among the following is incorrect about endoplasmic reticulum?a)These are complex network of membrane bounded tubulesb)They are classified as smooth and rough endoplasmic reticulumc)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other endd)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesisCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which among the following is incorrect about endoplasmic reticulum?a)These are complex network of membrane bounded tubulesb)They are classified as smooth and rough endoplasmic reticulumc)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other endd)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesisCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which among the following is incorrect about endoplasmic reticulum?a)These are complex network of membrane bounded tubulesb)They are classified as smooth and rough endoplasmic reticulumc)Rough endoplasmic reticulum is connected by nuclear membrane at one end and golgi apparatus on the other endd)Smooth endoplasmic reticulum has ribosomes attached to their surface and acts as site of protein synthesisCorrect answer is option 'D'. Can you explain this answer?.
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