LIFE SCIENCE

Detailed explanation-1: -A protein molecule is made from a long chain of these amino acids, each linked to its neighbor through a covalent peptide bond (Figure 3-1). Proteins are therefore also known as polypeptides. Each type of protein has a unique sequence of amino acids, exactly the same from one molecule to the next.

Detailed explanation-2: -Answer and Explanation: Proteins are composed of amino acid subunits.

Detailed explanation-3: -Single chains of amino acids that are the units of multimeric PROTEINS. Multimeric proteins can be composed of identical or non-identical subunits. One or more monomeric subunits may compose a protomer which itself is a subunit structure of a larger assembly.

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.

Detailed explanation-5: -There are 20 different amino acids that are available to be incorporated into proteins. The side chains of the 20 amino acids have different properties, which in turn give different properties to the amino acids.