Multiple Choice
Which of the following are functions of peripheral membrane proteins?
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6. The Membrane
Types of Membrane Proteins
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Which statement best describes how channel and carrier proteins in the plasma membrane are similar?
A
Both change shape to move substances across the membrane.
B
Both facilitate the transport of substances across the membrane.
C
Both require energy in the form of ATP to function.
D
Both are involved in active transport only.
Verified step by step guidance1
Understand the role of channel and carrier proteins in the plasma membrane. Both types of proteins are involved in the transport of substances across the cell membrane.
Channel proteins form pores in the membrane, allowing specific molecules or ions to pass through by diffusion. They do not change shape during the transport process.
Carrier proteins bind to specific molecules and change shape to shuttle them across the membrane. This shape change is crucial for their function.
Both channel and carrier proteins facilitate the transport of substances across the membrane, but they do so in different ways. Channel proteins provide a passageway, while carrier proteins undergo conformational changes.
Recognize that not all transport processes involving these proteins require energy. Channel proteins typically facilitate passive transport, while carrier proteins can be involved in both passive and active transport, depending on whether energy is required.
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