What is the general function of the plasma membrane?
DNA replication
Protein synthesis
Cellular respiration
Controlling material passage into and out of the cell
The plasma membrane is found in which types of cells?
Prokaryotic cells only
Eukaryotic cells only
Animal cells only
All living cells (prokaryotic and eukaryotic)
Approximately, what percentage of the plasma membrane is composed of proteins?
60-80%
30-40%
10-20%
80-90%
What is the primary role of carbohydrates in the plasma membrane?
Providing structural support
Facilitating cell adhesion
Regulating membrane fluidity
Transporting molecules across the membrane
Proteins in the plasma membrane can act as:
Transport channels or carriers
Enzymes
Receptors
All of the above
Which of the following is NOT a function of transport across the plasma membrane?
Obtaining nutrients
Excreting waste substances
Secreting useful substances
Modifying genetic material
The plasma membrane is NOT composed of:
Proteins
Lipids
Carbohydrates
Nucleic acids
Which of the following is NOT a function of the plasma membrane?
Controlling the passage of materials
Providing structural support
Facilitating cell communication
Regulating cell division
What is another name for the plasma membrane?
Cell wall
Cytoplasmic barrier
Nuclear membrane
Protoplasm
Which component of the plasma membrane is responsible for the selective
permeability of the membrane?
Proteins
Lipids
Carbohydrates
Nucleic acids
