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Plasma Membrane Structure and Function Quiz

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Plasma Membrane Structure and Function Quiz

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Questions and Answers

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?

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?

Nonpolar and hydrophilic

Nonpolar and hydrophobic (correct)

Polar and hydrophobic

Polar and hydrophilic

What is common to all cells?

Plasma membrane Signup and view all the answers

What is the region of the cell that the plasma membrane separates from the external environment?

Internal cytoplasm Signup and view all the answers

What is the main function of the plasma membrane in separating the internal cytoplasm from the external environment?

Allowing the exchange of materials between the cell and its environment Signup and view all the answers

What is the orientation of the fatty-acid tails in the phospholipid bilayer?

They are sandwiched in between the polar heads Signup and view all the answers

What is the relationship between the plasma membrane and the cell wall?

The plasma membrane is separate from the cell wall Signup and view all the answers

What is the role of the polar heads in the phospholipid bilayer?

They are involved in the exchange of materials between the cell and its environment Signup and view all the answers

What is the main characteristic of the external environment of the cell that the plasma membrane separates from?

It is variable and unpredictable Signup and view all the answers