Which of the following is a function of the membrane proteins called channel proteins?
A) They bind to specific extracellular molecules to trigger a cellular change.
B) They permit the passage of ions, bypassing the lipid portion of the cell membrane.
C) They are enzymes.
D) They serve as anchors or stabilizers for the cell membrane.
E) They are used as a source of energy.
Correct Answer:
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Q12: Which substances can pass directly through the
Q13: The smallest living things are
A) proteins.
B) organ
Q14: Structurally, the plasma membrane
A) contains no imbedded
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Q18: The plasma membrane
A) is a watery gel
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Q20: The phosphate "head" of a phospholipid is
A)
Q21: Which of these is an example of
Q22: The release of intracellular materials by a
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