Proteins: Unit 1

Question 1

Primary Level

Answer 1

linear chain of amino acids; determined via genes, dictates secondary and tertiary forms

Question 2

Secondary Level

Answer 2

Coiling and Folding begins because of hydrogen bonds w/n polypeptides backbone;

Question 3

Beta pleated sheet

Answer 3

secondary Level; hydrogen bonds between polypeptide chains lying side by side

Question 4

Alpha helix

Answer 4

hydrogen bonding between every 4th amino acid

Question 5

tertiary level

Answer 5

3D folding due to interactions between the side chains of the amino acids

Question 6

what reinforces the tertiary level?

Answer 6

hydrophobic interactions and disulfide bridges of the side chains; covalent bond formed between sulfur atoms of two cysteine monomers

Question 7

Quaternary Level

Answer 7

association of 2 or more polypeptides; found in only some proteins

Question 8

Fun fact

Answer 8

all 4 levels of a protein’s structure determine the protein’s function