Biological molecules

Front

Type of bond linking amino acids in a dipeptide?

Back

peptide bond

Answer explanation

A dipeptide is formed when two amino acids are linked together by a peptide bond. This bond is a specific type of covalent bond that occurs between the carboxyl group of one amino acid and the amino group of another.

Front

Sequence of amino acids coded by DNA?

Back

Protein.

Answer explanation

The sequence of amino acids coded by DNA forms proteins, which are essential for various biological functions. The other options (carbohydrates, lipids, nucleic acids) refer to different types of biomolecules.

Front

Bonds between amino acids in a chain that form alpha helices or beta sheets?

Back

Hydrogen bonds.

Answer explanation

The correct answer is hydrogen bonds, which stabilize the secondary structures of proteins like alpha helices and beta pleated sheets by forming between the backbone amide and carbonyl groups of amino acids.

Front

Protein structure with alpha helices and beta sheets.

Back

Secondary structure

Answer explanation

The secondary structure of proteins is characterized by the formation of alpha helices and beta sheets, which are stabilized by hydrogen bonds between the backbone atoms in the polypeptide chain.

Front

Type of interaction stabilizing protein tertiary structure?

Back

All of the above

Answer explanation

All of the listed interactions—hydrogen bonds, disulfide bridges, and hydrophobic interactions—contribute to stabilizing the tertiary structure of a protein, making 'All of the above' the correct answer.

Front

In the cell membrane, phospholipids form a -------- ?

Back

bilayer

Front

Identify the molecule:

Back

Triglyceride

Front

Triglycerides consist of -------------- and three fatty acids.

Back

Glycerol

Front

Bond between glycerol and fatty acids?

Back

Ester