NEET BIOLOGY

Detailed explanation-1: -Answer. The answer is amino acids. There are 20 amino acids, more in other organisms, and when they are strung together you get a polypeptide. This alone can be a protein, or it can associate with other polypeptides to form a larger complex.

Detailed explanation-2: -The shape of a protein is determined by its primary structure (sequence of amino acids). The sequence of amino acids in a protein is determined by the sequence of nucleotides in the gene (DNA) encoding it.

Detailed explanation-3: -The sequence of a protein is determined by the DNA of the gene that encodes the protein (or that encodes a portion of the protein, for multi-subunit proteins). A change in the gene’s DNA sequence may lead to a change in the amino acid sequence of the protein.

Detailed explanation-4: -The chemistry of amino acid side chains is critical to protein structure because these side chains can bond with one another to hold a length of protein in a certain shape or conformation. Charged amino acid side chains can form ionic bonds, and polar amino acids are capable of forming hydrogen bonds.

Detailed explanation-5: -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.