blended - amino acids, peptides + proteins

Question 1

what is a zwitterion

Answer 1

molecule containing
+ charged group (cation)
- charged group (anion)

Question 2

what allows amino acids to exist as solids at room temperatures

Answer 2

they are zwitterions

Question 3

what allows zwitterions to have a higher melting point

Answer 3

ionic nature = strong ionic bonds between (+) ion on one zwitterion and (-) ion of adjacent zwitterion

Question 4

are amino acids amphoteric?

Answer 4

yes because of zwitterionic nature

Question 5

what is an amphoteric compound

Answer 5

one that reacts as an acid and a base

Question 6

what happens to an amino acid when dissolved in an acidic solution

Answer 6

gain a proton

Question 7

what happens to an amino acid when dissolved in basic solution

Answer 7

they lose a proton
+ water is produced

Question 8

how are dipeptides formed

Answer 8

amino acid + amino acid
(condensation reaction)

Question 9

what bond is formed when amino acids are joined in a condensation reaction

Answer 9

peptide bond

Question 10

what are the functions of proteins

Answer 10

• enzymes
• growth+repair
  -hormones(insulin)