WILL GIVE BRAINLIEST An amino acid is to a polypeptide as:

glycogen is to glucose.

testosterone is to a steroid hormone.

a phospholipid is to a plasma membrane.

a nucleotide is to a nucleic acid.

The second option, but please correct me if I'm wrong.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.