GC1: Structures of Biomolecules

How many amino acids are considered standard?

• 18

• 20

• 32

• 26

Answer explanation

Which of the following is true about essential amino acids?

• They can be made by the body.

• They are the amino acids not found in any protein.

• They must be supplied in the body by eating protein-rich food.

• They cannot be processed by the body hence bad to one's health.

Answer explanation

This is an amide bond that links two amino acid residues.

• acid bond

• peptide bond

• amino bond

• disulfide bond

Answer explanation

It is the terminal of an amino acid sequence bearing the free amino group.

• C-terminal

• S-terminal

• O-terminal

• N-terminal

Answer explanation

This secondary structure is formed when a portion of amino acid sequence is spiraled around an imaginary axis.

Answer explanation

It is a type of attractive force that stabilizes the secondary structures of proteins.

• amide bond

• hydrogen bond

• covalent bond

• peptide bond

Answer explanation

This level of structure describes the three-dimensional structure of proteins.

• primary

• secondary

• tertiary

• quaternary

Answer explanation

This level of structure describes the aggregation of two or more subunits making up a protein.

• primary

• secondary

• tertiary

• quaternary

Answer explanation

It is a type of proteins with elongated structure.

• globular

• fibrous

• powdery

• fluid

Answer explanation

This is the process in which secondary, tertiary, and quaternary structures of proteins are disrupted.

• degradation

• condensation

• denaturation

• recombination

Answer explanation