Classify the following molecules based on their predicted movement across a semipermeable plasma membrane.

1. Glycerol
2. Lipid-soluble molecules
3. Amino acids such as tryptophan
4. Sugars
5. Oxygen gas
6. Starch
7. Carbon dioxide
8. Polar molecules
9. Gas
10. Ions

Require Membrane Proteins to Cross the Membrane:
- Amino acids such as tryptophan
- Sugars
- Starch
- Polar molecules
- Ions

Can Cross the Membrane Without Aid of Membrane Proteins:
- Glycerol
- Lipid-soluble molecules
- Oxygen gas
- Carbon dioxide
- Gas



Answer :

Final answer:

Polar and charged molecules require transmembrane proteins to pass through the plasma membrane.


Explanation:

Polar molecules and charged molecules face difficulty diffusing through the lipid core of the plasma membrane. They rely on transmembrane proteins, such as channels, to assist in their transport across the membrane.


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