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Cell Communication: Type of Ligand

APBIO-K4VG13

Observe the diagram below.

Kempels, Dana M. "Plants and the Environment: Tropisms, Circadian Rhythms and More." BIL 226. Http://www.bio.miami.edu/dana/dana.html, n.d. Web. 16 Mar. 2016.

Does this diagram represent a protein or steroid ligand?

A

This is a steroid ligand since the molecule attaches to a receptor on the outside of the cell membrane.

B

This is a protein ligand since the molecule attaches to a receptor on the outside of the cell membrane.

C

This is a steroid since the shape is of a hydrocarbon ring, which is common in hydrophobic molecules.

D

This is a protein since the molecule is hydrophilic and can cross the phospholipid bilayer easily.