amino acids and proteins

Question 1

what are the biological roles of proteins?

Answer 1

transport, storage, catalysts, motion, support, immune protection, nerve impulse transmission, control of metabolism and growth

Question 2

what are proteins made of?

Answer 2

polypeptide chain(s) made of amino acids linked by peptide bonds

Question 3

what is the structure of an amino acid?

Answer 3

COOH
|
H2N - C - H
|
R

Question 4

how can amino acids act as protein donors?

Answer 4

COOH to COO- and H+

Question 5

how can amino acids act as protein acceptors?

Answer 5

NH2 and H+ to NH3+

Question 6

why can amino acids have isomers?

Answer 6

they are asymmetric

Question 7

what is electronegativiy?

Answer 7

the power of an atom to attract electrons towards itself

Question 8

what is a peptide bond?

Answer 8

C=O is bonded to N-H

Question 9

what is primary protein structure?

Answer 9

amino acid sequence

Question 10

what is secondary protein structure?

Answer 10

a-helix, b-sheet

Question 11

what is tertiary protein structure?

Answer 11

3-D interactions between R groups

Question 12

what is quaternary structure?

Answer 12

3-D interaction of protein subunits with more than one polypeptide