_extend from nucleus and touch cell membrane.
Correct answer: D. Both A and B
- A. SER
- B. RER
- C. Golgi apparatus
- D. Both A and B
Explanation
The Endoplasmic Reticulum (ER) is a continuous membrane system that forms a series of flattened sacs within the cytoplasm and is involved in the synthesis of proteins and lipids. The ER extends from the nuclear envelope but does not directly touch the cell membrane. The Smooth ER (SER) is involved in lipid synthesis, while the Rough ER (RER) is studded with ribosomes and is involved in protein synthesis. The Golgi apparatus, on the other hand, processes and packages proteins and lipids, and does not extend from the nucleus to the cell membrane. Therefore, the correct answer is both A and B, as the ER network, which includes both SER and RER, extends from the nucleus.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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