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Questions and Answers
What is the primary function of the cell membrane?
What is the primary function of the cell membrane?
- To store genetic information
- To provide structural support to the nucleus
- To regulate the transport of materials into and out of the cell (correct)
- To facilitate protein synthesis
Which component of the cell membrane plays a key role in cell recognition?
Which component of the cell membrane plays a key role in cell recognition?
- Cytoplasm
- Transport proteins
- Carbohydrate chains (correct)
- Phospholipids
What is the main function of the nucleus in a cell?
What is the main function of the nucleus in a cell?
- To support cellular respiration
- To form the structural framework of the cell
- To control the cell's activities and contain DNA (correct)
- To facilitate the movement of substances across the membrane
What structural feature characterizes the cell membrane?
What structural feature characterizes the cell membrane?
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What substance surrounds the nucleus and contains organelles?
What substance surrounds the nucleus and contains organelles?
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Study Notes
Cell Membrane
- The cell membrane (plasma membrane) is the outermost layer of a cell.
- It separates the cell's interior from the external environment.
- Regulates the movement of substances entering and leaving the cell.
- Composed of a phospholipid bilayer, proteins, and carbohydrate chains.
Nucleus
- The nucleus acts as the cell's control center.
- Contains the cell's DNA (genetic material).
Cytoplasm
- The cytoplasm (cytosol) surrounds the nucleus.
- Contains organelles (specialized structures within the cell).
- Facilitates movement of genetic material and cellular respiration products.
Cell Membrane Structure
- Phospholipids: Form the fundamental structure of the membrane.
- Proteins: Embedded within the phospholipid bilayer; some facilitate transport across the membrane (transport proteins).
- Carbohydrate Chains: Located on the membrane surface, contributing to cell-cell recognition and communication.
- Cells vary in size, shape, and function.
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