1. Nucleus: The nucleus is the largest organelle in a cell and is surrounded by a nuclear envelope, which is a double membrane. It contains the cell's DNA and controls the cell's growth and reproduction.

2. Mitochondria: Mitochondria are surrounded by two membranes. They are the powerhouses of the cell, producing energy through the process of cellular respiration.

3. Endoplasmic Reticulum (ER): The ER is a network of tubules and sacs that is surrounded by a membrane. It is involved in protein and lipid synthesis. The ER can be rough (with ribosomes on its surface) or smooth (without ribosomes).

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1. Nucleus: The nucleus is the largest organelle in a cell and is surrounded by a nuclear envelope, which is a double membrane. It contains the cell's DNA and controls the cell's growth and reproduction.

2. Mitochondria: Mitochondria are surrounded by two membranes. They are the powerhouses of the cell, producing energy through the process of cellular respiration.

3. Endoplasmic Reticulum (ER): The ER is a network of tubules and sacs that is surrounded by a membrane. It is involved in protein and lipid synthesis. The ER can be rough (with ribosomes on its surface) or smooth (without ribosomes).

Knowee AI · Accepted Answer

1. Nucleus: The nucleus is the largest organelle in a cell and is surrounded by a nuclear envelope, which is a double membrane. It contains the cell's DNA and controls the cell's growth and reproduction.

2. Mitochondria: Mitochondria are surrounded by two membranes. They are the powerhouses of the cell, producing energy through the process of cellular respiration.

3. Endoplasmic Reticulum (ER): The ER is a network of tubules and sacs that is surrounded by a membrane. It is involved in protein and lipid synthesis. The ER can be rough (with ribosomes on its surface) or smooth (without ribosomes).

dentify three organelles that aresurrounded by a membrane

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