Multiple Choice
Which of the following is a key function carried out by membrane proteins?
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6. The Membrane
Types of Membrane Proteins
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Which of the following is a function of a plasma membrane protein?
A
Synthesizing proteins
B
Storing genetic information
C
Producing ATP
D
Transporting molecules across the membrane
Verified step by step guidance1
Understand the role of the plasma membrane: The plasma membrane is a biological membrane that separates the interior of all cells from the outside environment. It is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells.
Identify the functions of plasma membrane proteins: Plasma membrane proteins are involved in various functions such as transport, signal transduction, cell recognition, and maintaining the cell's shape.
Focus on transport function: One of the primary functions of plasma membrane proteins is to facilitate the transport of molecules across the membrane. This can occur through passive transport (such as diffusion and facilitated diffusion) or active transport (requiring energy).
Differentiate from other cellular functions: Synthesizing proteins, storing genetic information, and producing ATP are functions associated with other cellular components like ribosomes, the nucleus, and mitochondria, respectively.
Conclude with the correct function: Based on the understanding of plasma membrane proteins, the function that matches is 'Transporting molecules across the membrane.'
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