Multiple Choice
Which of the following statements about transmembrane domains is true?
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6. The Membrane
Types of Membrane Proteins
Multiple Choice
Which of the following statements is true regarding carrier proteins in cell membranes?
A
Carrier proteins are involved in the synthesis of membrane lipids.
B
Carrier proteins are exclusively found in the outer mitochondrial membrane.
C
Carrier proteins facilitate the passive transport of substances across the membrane.
D
Carrier proteins are responsible for the structural integrity of the cell membrane.
Verified step by step guidance1
Understand the role of carrier proteins: Carrier proteins are integral membrane proteins that facilitate the transport of specific substances across a cell membrane.
Differentiate between passive and active transport: Carrier proteins can be involved in both passive (facilitated diffusion) and active transport, but the statement focuses on passive transport.
Evaluate the statement about synthesis of membrane lipids: Carrier proteins do not synthesize membrane lipids; this is a function of enzymes in the endoplasmic reticulum.
Consider the location of carrier proteins: Carrier proteins are not exclusively found in the outer mitochondrial membrane; they are present in various cellular membranes, including the plasma membrane.
Assess the structural role of carrier proteins: Carrier proteins are not primarily responsible for the structural integrity of the cell membrane; this role is mainly attributed to the lipid bilayer and structural proteins like spectrin.
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