AP BIOLOGY

Detailed explanation-1: -The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain (see below).

Detailed explanation-2: -Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains. There are 20 different types of amino acids that can be combined to make a protein.

Detailed explanation-3: -The simplest, and smallest, amino acid found in proteins is glycine for which the R-group is a hydrogen (H). In proteins, only the L-isomer is found normally.

Detailed explanation-4: -Protein Structure and Function The most common number of subunits is either 2 (dimer) or 4 (tetramer), but trimers, pentamers, and hexadecamers and higher order structures also occur.