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Multiple Choice
Which of the following is correct regarding peripheral membrane proteins?
A
They are temporarily attached to the lipid bilayer or integral proteins.
B
They are permanently embedded within the lipid bilayer.
C
They span the entire lipid bilayer.
D
They are involved in active transport across the membrane.
Verified step by step guidance
1
Understand the definition of peripheral membrane proteins: These proteins are not embedded within the lipid bilayer but are instead temporarily attached to the lipid bilayer or to integral proteins.
Differentiate between peripheral and integral membrane proteins: Integral proteins are permanently embedded within the lipid bilayer and often span the entire bilayer, whereas peripheral proteins are attached temporarily.
Consider the function of peripheral membrane proteins: They often play roles in signaling or maintaining the cell's shape, rather than spanning the bilayer or being involved in active transport.
Evaluate the options given: Identify which options describe characteristics of peripheral membrane proteins, focusing on their temporary attachment rather than permanent embedding or spanning the bilayer.
Select the correct statement: Based on the understanding that peripheral membrane proteins are temporarily attached, choose the option that accurately describes this characteristic.