chap 18

Question 1

Four types of macromolecules

Answer 1

Poteins, nucleic acid, lipids and carbs

Question 2

What are the acidic amino acids

Answer 2

Aspartic and glutamic acid

Question 3

What are the basic amino acids

Answer 3

Arginine and Histidine

Question 4

What are the aromatic amino acids

Answer 4

phenylalanine, tryptophan, tyrosine

Question 5

What are the hydroxilic amino acids

Answer 5

serine and threonine

Question 6

what are the amidic amino acids

Answer 6

asparagine and glutamine

Question 7

what the isoelectric point means (for an amino acid, and a protein)

Answer 7

The pH where there are equal numbers of +/- charges on the A.A.

Question 8

chirality

Answer 8

Contains 4 different substituents

Question 9

four levels of protein structure.

Answer 9

• Primary – the sequence of amino acids
• Secondary – Local folding – alpha helix and beta sheets
• Tertiary – structure of the entire protein
• Quaternary – How the protein interacts with other proteins

Question 10

what are the 9 essential amino acids

Answer 10

histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine

Question 11

collagen

Answer 11

– major structure in connective tissue

o Triple helix

Question 12

Hemoglobin

Answer 12

o 4 polypeptide chains – heme
o Contains iron
o Transport protein – transports O2 and CO2

Question 13

Myoglobin

Answer 13

o Very high affinity for O2

o Found in the muscles

Question 14

Insolun

Answer 14

o Attaches to cells to allow uptake of blood glucose

Chemical properties of proteins (hydrolysis)

Question 15

Denaturation

Answer 15

breaking down a protein to its primary structure.
o	Heat
o	Mechanical agitation
o	Detergents
o	Organic compounds
o	pH change
o	Inorganic salts