Chapter 7 post quiz

Question 1

This question might or might not have multiple correct answers.

Which functional group(s) is every amino acid expected to contain?

Answer 1

Amino

Carboxyl

Question 2

What level of protein structure involves the interaction between amino acid side chains that are part of two different polypeptide chains?

Answer 2

quaternary

Question 3

Which functional group can act as a base?

Answer 3

amino

Question 4

The biochemical reaction that joins two amino acids to form a dipeptide is accompanied by

Answer 4

the release of a water molecule.

Question 5

Which of the following molecules lacks amino acids?

Answer 5

cholesterol

Question 6

What structural feature makes the 20 common amino acids different from one another?

Answer 6

different side chains (R groups) attached to an α carbon

Question 7

Which bonds are created during the formation of the primary structure of a protein?

Answer 7

peptide bonds

Question 8

What maintains the secondary structure of a protein?

Answer 8

hydrogen bonds between the amino group of one peptide bond and the carboxyl group of another peptide bond

Question 9

The α helix and β pleated sheet are examples of which level of protein structure?

Answer 9

secondary

Question 10

The tertiary structure of a polypeptide is the

Answer 10

overall three-dimensional shape of a fully folded polypeptide

Question 11

A peptide bond is:

Answer 11

a covalent bond linking the amino group of one amino acid to the carboxyl group of another amino acid

Question 12

A disulfide bond is:

Answer 12

a covalent bond between two cysteines in a protein

Question 13

Match the protein function with the correct example.

Defense
Transport
Structure

Answer 13

Defense- antibodies bind to foreign invaders such as bacteria or viruses

Transport- the sodium-potassium pump moves ions across the membrane

Structure- keratin makes up hair, horns, and claws