Multiple Choice
In the context of the lipid bilayer, which part of a phospholipid is polar (hydrophilic)?
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8. Membrane Structure
The Lipid Bilayer
Multiple Choice
In the context of the lipid bilayer, the primary structural components of the cell (plasma) membrane are:
A
DNA and ribosomes forming a protective boundary
B
Phospholipids arranged in a bilayer
C
Triglycerides packed into a single monolayer
D
Cellulose microfibrils embedded in a matrix of pectin
Verified step by step guidance1
Identify the main structural components of the plasma membrane by recalling its composition: the plasma membrane primarily consists of a lipid bilayer.
Understand that phospholipids are amphipathic molecules with hydrophilic heads and hydrophobic tails, which arrange themselves into a bilayer to form a stable barrier in aqueous environments.
Recognize that DNA and ribosomes are not structural components of the membrane; instead, they are involved in genetic information storage and protein synthesis, respectively.
Note that triglycerides do not form membranes; they are storage lipids and do not arrange into bilayers or monolayers in membranes.
Acknowledge that cellulose microfibrils and pectin are components of the plant cell wall, not the plasma membrane, so they are not relevant to the membrane's structure.
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