BIOMOLECULES AND ENZYMES

BIOLOGY

PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What are some shorter chains of amino acids considered?
A
hormones
B
lipids
C
polypeptides
D
carbohydrate side chains
Explanation: 

Detailed explanation-1: -Peptides are generally considered to be short chains of two or more amino acids. Meanwhile, proteins are long molecules made up of multiple peptide subunits, and are also known as polypeptides.

Detailed explanation-2: -The smallest functional polypeptide is glutathione with only three amino acids.

Detailed explanation-3: -A peptide is a short chain of amino acids (typically 2 to 50) linked by chemical bonds (called peptide bonds). A longer chain of linked amino acids (51 or more) is a polypeptide. The proteins manufactured inside cells are made from one or more polypeptides.

Detailed explanation-4: -Polypeptide chains are formed by dehydration between the amino group of a L-amino acid4 with the carboxyl group of another. One hundred or more amino acids are linked together with covalent peptide bonds in various specific sequences in the polypeptide chain with polypeptide chains combining to form a protein.

Detailed explanation-5: -Answer and Explanation: Amino acids are joined together to form polypeptides and proteins through a condensation reaction. A peptide bond is formed between the carboxyl group of one amino acid and the amine group of another. A typical protein molecule must have at least 50 amino acids joined together.

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