Protein Structure

Front

What is the tertiary structure of a protein?

Back

The tertiary structure refers to the three-dimensional shape of a protein formed by the folding of a single polypeptide chain, stabilized by various interactions such as hydrogen bonds, disulfide bridges, and hydrophobic interactions.

Front

What types of bonds are present in the tertiary structure of proteins?

Back

The tertiary structure can include hydrogen bonds, disulfide bridges, and hydrophobic interactions.

Front

What is the primary function of enzymes?

Back

Enzymes speed up chemical reactions by lowering the activation energy required for the reaction to occur.

Front

What is one of the key functions of proteins in biological systems?

Back

Proteins serve as enzymes, which catalyze biochemical reactions.

Front

What distinguishes tertiary structure from quaternary structure in proteins?

Back

Tertiary structure consists of a single polypeptide chain, while quaternary structure consists of two or more polypeptide chains.

Front

Which protein structure describes a protein's three-dimensional shape?

Back

The tertiary structure describes a protein's three-dimensional shape.

Front

What is the primary structure of a protein?

Back

The primary structure is the linear sequence of amino acids in a polypeptide chain.

Front

What is the secondary structure of a protein?

Back

The secondary structure refers to local folded structures that form within a polypeptide due to hydrogen bonding, such as alpha helices and beta sheets.

Front

What role do hydrophobic interactions play in protein structure?

Back

Hydrophobic interactions help stabilize the tertiary structure by causing nonpolar side chains to cluster away from water.

Front

What is a disulfide bridge?

Back

A disulfide bridge is a covalent bond formed between the sulfur atoms of two cysteine residues, contributing to the stability of a protein's tertiary structure.