Protein Structure

Question 1

Made up of amino acids that are linked through dehydration synthesis and the formation of peptide bonds

Answer 1

Protein structures

Question 2

……. groups determine the nature of the AA (…….- R is hydrogen ‘smallest’)

Answer 2

R, glycine

Question 3

…… AAs exist but only 20 are used in proteins

Answer 3

300

Question 4

AA are classified as ……..r or………

Answer 4

hydrophilic polar, hydrophobic nonpolar

Question 5

An amino acid is composed of a ……. linked to a ……., …… group, …. group, and … variable group

Answer 5

central alpha carbon , hydrogen, carboxyl group, amino group, and R variable group

Question 6

neutral

Answer 6

Nonpolar

Question 7

neutral at normal pH (has
hydroxyl in R group)

Answer 7

Polar

Question 8

R is proton donor negative
charged

Answer 8

Acidic

Question 9

R is proton acceptor. Positively charged

Answer 9

Basic

Question 10

Alanine, glycine, leucine,
isoleucine, methionine,
phenylalanine, proline,
tryptophan, and valine

Answer 10

non polar

Question 11

Serine, threonine,
asparagine, glutamine,
tyrosine, and cysteine

Answer 11

polar

Question 12

Aspartic acid/ aspartate
Glutamic acid/ glutamate

Answer 12

acidic

Question 13

Arginine, lysine, and
histidine

Answer 13

Basic

Question 14

linear sequence of polypeptides that is read from n-terminus to c-terminus

Answer 14

Primary:

Question 15

insulin has ….. linear chains: A and B

Answer 15

2 (primary)

Question 16

has alpha helices and beta pleated sheets linked by hydrogen bonds (foldings)

Answer 16

Secondary:

Question 17

secondary DOES NOT INVOLVE ….. GROUPS (ONLY THE BACKBONE AA ARE ……).

Answer 17

R, folded

Question 18

(3D form) Interactions of R groups through hydrogen bonds, ionic bonds, dipole interactions,
and London dispersion forces make this structure.

Answer 18

Tertiary:

Question 19

some proteins or enzymes are composed of more than one polypeptide chain. Subunits which
are the polypeptide chains bond together through hydrogen bonds to form the ……..re.

Answer 19

Quaternary:

Question 20

Hemoglobin

Answer 20

Quaternary:

Question 21

Enzymatic reactions

Answer 21

protein

Question 22

proteins are hormonal such as

Answer 22

insulin

Question 23

Proteins are structural such as

Answer 23

collagen

Question 24

proteins, Defense and i…….. system.

Answer 24

immune

Question 25

Proteins, Transport such as …….

Answer 25

hemoglobin