Module 3 quiz

Question 1

Name five different functions of proteins.

Answer 1

Transport, hormones, catalysis, structure, and protection

Question 2

What function does a protease have?

Answer 2

catalysis. It degrades proteins.

Question 3

What is the function of hormones?

Answer 3

These proteins communicate from one cell to another

Question 4

What are the functional groups common to all amino acids?

Answer 4

amine and carboxylic acid

Question 5

Briefly describe the five major groupings of amino acids.

Answer 5

The amino acids are grouped into 1) nonpolar, aliphatic 2) nonpolar and aromatic 3) polar but neutral, 4) acidic, and 5) basic.

Question 6

Draw Arginine

Answer 6

Arg, R, basic

Question 7

What amino acid can form a disulfide bond? Draw

Answer 7

Cysteine, polar but neutral, Cys, C

Question 8

Which amino acid is the only one to have its side chain connected to the amine group?
Draw

Answer 8

Proline, non polar aliphatic, Pro, P

Question 9

Types of secondary structure

Answer 9

• alpha helices
  -beta sheet
  -beta-turns

Question 10

Types of conformation

Answer 10

1) Globular
2) Fibrous

Question 11

ETYLVD

Answer 11

N terminal: Glutamic Acid
C terminal: Aspartic Acid

Question 12

if there are 4 amino acids how many peptide bonds

Answer 12

3

Question 13

Differentiate between protein tertiary structure and protein quaternary structure.

Answer 13

Tertiary structure is the conformation or shape of a single polypeptide chain. Quaternary structure is the orientation of multiple subunits.

Question 14

Proteins typically adopt either a conformation that is fibrous or ___________.

Answer 14

globular

Question 15

What is the function of an enzyme?

Answer 15

to accelerate the rate of a biological reaction

Question 16

How does a competitive inhibitor differ from a uncompetitive inhibitor?

Answer 16

A competitive inhibitor binds at the active site of the enzyme. An uncompetitive inhibitor binds at a site distinct from the active site, but it still inhibits the enzyme.