IB Biology 2.4 Proteins

Front

What is insulin?

Back

Insulin is a hormone produced by the pancreas that regulates blood sugar levels by promoting glucose uptake into cells.

Front

How many polypeptides does insulin contain?

Back

Insulin contains 2 polypeptides.

Front

What is a polypeptide?

Back

A polypeptide is a chain of amino acids that are linked together by condensation reactions.

Front

What amino acid is known as Glutamic acid?

Back

Glutamic acid is one of the 20 standard amino acids used by cells to synthesize proteins.

Front

What is the primary function of insulin?

Back

The primary function of insulin is to regulate blood sugar levels.

Front

What is the structure of proteins?

Back

Proteins have four levels of structure: primary, secondary, tertiary, and quaternary.

Front

What is a secondary structure of protein?

Back

The secondary structure of a protein refers to the local folded structures that form within a polypeptide due to hydrogen bonding.

Front

What is the role of amino acids in proteins?

Back

Amino acids are the building blocks of proteins, linked together to form polypeptides.

Front

What is the difference between a peptide bond and a polypeptide?

Back

A peptide bond is the bond that links two amino acids together, while a polypeptide is a chain of many amino acids linked by peptide bonds.

Front

What is the significance of the sequence of amino acids in a protein?

Back

The sequence of amino acids determines the protein's structure and function.