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Questions and Answers
What is the primary function of the plasma membrane in a cell?
What is the primary function of the plasma membrane in a cell?
- To separate the internal cytoplasm from the external environment (correct)
- To provide structural support to the cell
- To facilitate the exchange of genetic material between cells
- To synthesize proteins and other cellular molecules
What is the composition of the phospholipid bilayer in the plasma membrane?
What is the composition of the phospholipid bilayer in the plasma membrane?
- Polar, hydrophilic tails sandwiched between nonpolar heads
- Nonpolar, hydrophobic tails sandwiched between polar heads (correct)
- Polar, hydrophilic heads sandwiched between nonpolar tails
- Nonpolar, hydrophobic heads sandwiched between polar tails
What is the characteristic of the fatty-acid tails in the phospholipid bilayer?
What is the characteristic of the fatty-acid tails in the phospholipid bilayer?
- Nonpolar and hydrophilic
- Nonpolar and hydrophobic (correct)
- Polar and hydrophobic
- Polar and hydrophilic
What is common to all cells?
What is common to all cells?
What is the region of the cell that the plasma membrane separates from the external environment?
What is the region of the cell that the plasma membrane separates from the external environment?
What is the main function of the plasma membrane in separating the internal cytoplasm from the external environment?
What is the main function of the plasma membrane in separating the internal cytoplasm from the external environment?
What is the orientation of the fatty-acid tails in the phospholipid bilayer?
What is the orientation of the fatty-acid tails in the phospholipid bilayer?
What is the relationship between the plasma membrane and the cell wall?
What is the relationship between the plasma membrane and the cell wall?
What is the role of the polar heads in the phospholipid bilayer?
What is the role of the polar heads in the phospholipid bilayer?
What is the main characteristic of the external environment of the cell that the plasma membrane separates from?
What is the main characteristic of the external environment of the cell that the plasma membrane separates from?
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