Proteins 1

Question 1

What is the process of protein synthesis?

Answer 1

DNA -Transcription-> RNA -Translation-> Protein

Question 2

Define a codon.

Answer 2

Defined by the initial nucleotide from which translation starts.

Question 3

Define a peptide bond.

Answer 3

The formation of a covalent bond with the loss of one molecule of water.

H O
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N—-C

Question 4

What is primary structure?

Answer 4

The sequence of amino acids in a polypeptide chain.

Question 5

What is secondary structure?

Answer 5

The spacial arrangement of amino acid residues that are near each other in the linear sequence.

Question 6

What are the two types of secondary structure?

Answer 6

Alpha helixes which are held together by hydrogen bonds between the N-H and O=C of the next group.

Beta plated sheets which are held together by hydrogen bonds between the amide groups.

Question 7

What is tertiary structure?

Answer 7

The spatial arrangement of amino acid residues that are far apart in a linear sequence.

Question 8

What are the 5 types of bonding in tertiary/quaternary structure?

Answer 8

Van Der Waals
Ionic interactions
Hydrogen bonds
Disulfide bridges
Hydrophobic interactions

Question 9

What is quaternary structure?

Answer 9

Refers to the spatial arrangement of individual polypeptide chains in a multi-subunit protein.