Class 1 E1

Question 1

R-O-H

Answer 1

hydroxyl

Question 2

hydroxyl groups

Answer 2

participate in rxns including esterification, dehydration, oxidation.

Question 3

R-C-H
||
O

Answer 3

carbonyl (aldehydes and ketones)

Question 4

carbonyl group

Answer 4

polar, subjected to nucleophilic attack by hydroxy / amino groups.

Question 5

R-C-O
||
O

Answer 5

carboxyl

Question 6

carboxyl

Answer 6

weak acids, form esters and amides.

Question 7

R1-C-O-R2
||
O

Answer 7

ester

Question 8

ester

Answer 8

result of hydroxy and carboxylic acid rxns, commonly found in lipids.

Question 9

R-S-H

Answer 9

thiol

Question 10

thiol

Answer 10

hydroxyl analogs, found in cysteine.

Question 11

R-S-S-R’

Answer 11

disulfide

Question 12

disulfide

Answer 12

result of rxn of two thiol groups, reducing agents cleave disulfide, restoring two thiols.

Question 13

R1-C-S-R2
||
O

Answer 13

thioester

Question 14

thioester

Answer 14

large negative free E of hydrolysis

Question 15

R-NH3

Answer 15

amino

Question 16

amino

Answer 16

lone pair can acquire a proton, leads to positively charged amino group.

Question 17

R-(C=O)-(N-R)-H

Answer 17

amide

Question 18

amide

Answer 18

formed via amine and carboxylic acid rxn; peptides are amide linkages found in proteins.

Question 19

phosphates

Answer 19

inorganic phosphate Pi

Question 20

phosohoesters

Answer 20

phosphate group plus hydroxyl group

Question 21

phosphoanhydrides

Answer 21

found in nucleoside triphosphates like ATP, large negative free E of hydrolysis