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Consider the following statement (a) E...

Consider the following statement
(a) Endomembrane system includes mitochondria , chloroplast and peroxisomes
(b) Smooth endoplasmic reticulum is major site for synthesis of lipid
(c) Rough endoplamic reticulum is actually involved in protein synthesis
(d) Mitchondrial matrix possesses single cirular DNA , a few RNAs and 80 S ribosomes
Of the above statements

A

a and b alone are correct

B

a and c alone are correct

C

b and d alone are correct

D

b and c along are correct

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the statements provided in the question, we will evaluate each statement one by one to determine which are correct. ### Step-by-Step Solution: 1. **Evaluate Statement (a)**: - The statement claims that the endomembrane system includes mitochondria, chloroplasts, and peroxisomes. - **Analysis**: The endomembrane system consists of organelles that are involved in the synthesis, modification, packaging, and transport of proteins and lipids. This includes the endoplasmic reticulum, Golgi apparatus, lysosomes, vesicles, and the nuclear envelope. Mitochondria and chloroplasts are not part of the endomembrane system. - **Conclusion**: Statement (a) is **incorrect**. 2. **Evaluate Statement (b)**: - The statement claims that the smooth endoplasmic reticulum (SER) is the major site for the synthesis of lipids. - **Analysis**: The smooth endoplasmic reticulum is indeed involved in lipid synthesis, including phospholipids and cholesterol, as well as lipid-derived hormones. This statement is consistent with the known functions of the SER. - **Conclusion**: Statement (b) is **correct**. 3. **Evaluate Statement (c)**: - The statement claims that the rough endoplasmic reticulum (RER) is involved in protein synthesis. - **Analysis**: The rough endoplasmic reticulum is studded with ribosomes, which are the sites of protein synthesis. Therefore, this statement accurately describes the function of the RER. - **Conclusion**: Statement (c) is **correct**. 4. **Evaluate Statement (d)**: - The statement claims that the mitochondrial matrix possesses single circular DNA, a few RNAs, and 80S ribosomes. - **Analysis**: Mitochondria do contain circular DNA and some RNA, but they have 70S ribosomes, not 80S ribosomes. The presence of 80S ribosomes is characteristic of eukaryotic cytoplasm, not mitochondria. - **Conclusion**: Statement (d) is **incorrect**. ### Final Conclusion: - The correct statements are (b) and (c). - Therefore, the answer is that statements (b) and (c) are correct.
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