To determine which component is part of all cells, we need to analyze the options provided: A. Golgi apparatus, B. endoplasmic reticulum, C. nucleus, D. cell membrane, and E. lysosome.

Step 1: Let's consider each option and evaluate if it is present in all cells.

Option A: Golgi apparatus - The Golgi apparatus is an organelle involved in processing and packaging proteins. While it is present in many cells, it is not found in all cells. Therefore, we can eliminate this option.

Option B: Endoplasmic reticulum - The endoplasmic reticulum is an organelle involved in protein synthesis and lipid metabolism. Similar to the Golgi apparatus, it is present in many cells but not in all cells. Thus, we can eliminate this option as well.

Option C: Nucleus - The nucleus is a membrane-bound organelle that contains the cell's genetic material. It is a vital component of eukaryotic cells, which include plants, animals, fungi, and protists. However, prokaryotic cells, such as bacteria, do not have a nucleus. Therefore, the nucleus is not part of all cells, and we can eliminate this option.

Option D: Cell membrane - The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that surrounds the cell. It is present in all cells, both prokaryotic and eukaryotic. The cell membrane regulates the movement of substances in and out of the cell, maintaining its internal environment. Therefore, we can conclude that the cell membrane is part of all cells.

Option E: Lysosome - Lysosomes are membrane-bound organelles involved in the digestion and recycling of cellular waste. While lysosomes are present in many eukaryotic cells, they are not found in all cells. Therefore, we can eliminate this option.

In conclusion, the component that is part of all cells is the cell membrane (Option D).

Question

To determine which component is part of all cells, we need to analyze the options provided: A. Golgi apparatus, B. endoplasmic reticulum, C. nucleus, D. cell membrane, and E. lysosome.

Step 1: Let's consider each option and evaluate if it is present in all cells.

Option A: Golgi apparatus - The Golgi apparatus is an organelle involved in processing and packaging proteins. While it is present in many cells, it is not found in all cells. Therefore, we can eliminate this option.

Option B: Endoplasmic reticulum - The endoplasmic reticulum is an organelle involved in protein synthesis and lipid metabolism. Similar to the Golgi apparatus, it is present in many cells but not in all cells. Thus, we can eliminate this option as well.

Option C: Nucleus - The nucleus is a membrane-bound organelle that contains the cell's genetic material. It is a vital component of eukaryotic cells, which include plants, animals, fungi, and protists. However, prokaryotic cells, such as bacteria, do not have a nucleus. Therefore, the nucleus is not part of all cells, and we can eliminate this option.

Option D: Cell membrane - The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that surrounds the cell. It is present in all cells, both prokaryotic and eukaryotic. The cell membrane regulates the movement of substances in and out of the cell, maintaining its internal environment. Therefore, we can conclude that the cell membrane is part of all cells.

Option E: Lysosome - Lysosomes are membrane-bound organelles involved in the digestion and recycling of cellular waste. While lysosomes are present in many eukaryotic cells, they are not found in all cells. Therefore, we can eliminate this option.

In conclusion, the component that is part of all cells is the cell membrane (Option D).

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