Progesterone is a hormone that contains two ketone groups. The oxygen in the ketone group can function as a hydrogen bond acceptor. Select the amino acids that have side chains that can form a hydrogen bond with progesterone at pH 7.

a. threonine.

b. cysteine.

c. alanine.

d. aspartate.

e. arginine.

f. tryptophan.

Cystein, threonine and tryptophan can form hydrogen bond with progesterone

Explanation:

Those amino acids have -OH or H subunit in their side chain and these moities are very esential for hydrogen bond formstion with progesterone

A hydrogen bond can be said to be a partial intermolecular bonding between a lone pair on an electron rich donor atom, particularly highly electronegatine elements like nitrogen, oxygen, or fluorine  and the antibonding orbital of a bond between hydrogen (H) and another more electronegative atom or group. Dotted or dashed line is always used to  indicates the hydrogen bond.

Hydrogen bonding can also be seen existing between water molecules or hydrogen fluoride molecules since each molecule contains hydrogen bonded to a hyghly electronegative element.