unit 4

Question 1

4 types of very large organic molecules

Answer 1

carbohydrates-proteins-lipids-nucleic acid

Question 2

macromolecules composed of many repeating subunits

Answer 2

polymers

Question 3

polymers are formed by ?

Answer 3

dehydration synthesis

Question 4

Carbohydrates are molecules made up of?
in a ratio of?

Answer 4

carbon/hydrogenloxygen
ratio:1:2:1

Question 5

carbohydrates may be ?

Answer 5

1. monosaccharides
2. disaccharides
3. polysaccharides

Question 6

monosaccharides such as?

Answer 6

glucose & fructose

Question 7

disaccharides such as ?

Answer 7

sucrose (glucose linked to fructose)

Question 8

polysaccharides such as ?

Answer 8

starch/glycogen/cellulose

Question 9

monosaccharides such as glucose & fructose are ?

Answer 9

Reducing sugars

Question 10

Benedict test identifies ?

Answer 10

Reducing sugars

Question 11

if the solution turned green in a benedict test that means ?

Answer 11

there is a small amount of reducing sugar

Question 12

A reddish orange in benedict test indicates ?

Answer 12

An abundance(large amount) amount of reducing sugars

Question 13

glucose+benedict reagent whats the result

Answer 13

positive / Reddish orange solution

Question 14

anything other than monosaccharides+benedict reagent =

Answer 14

negative / blue color solution

Question 15

Plants store small amount of carbs in the form of starch ? true or false

Answer 15

FALSE (LARGE AMOUNT)

Question 16

Animal cell store small amount of carbs in the form of ?

Answer 16

glycogen

Question 17

Polysaccharides react with…….(1)to form a………..(2)

Answer 17

1. iodine
   2.dark blue to black color

Question 18

lugol iodine test is to identify ?

Answer 18

starch (polysaccharides)

Question 19

Negative lugols iodine test result in ?

Answer 19

Reddish orange

Question 20

whats used to detect lipid ions ?

Answer 20

Sudan IV

Question 21

Proteins are macromolecules composed of ??

Answer 21

Amino acids

Question 22

special covalent bond for proteins is called ?

Answer 22

peptide bond

Question 23

biuret test is for the presence of ?

Answer 23

Peptide bond

Question 24

if the biuret reagent turned violet that means?

Answer 24

there is peptide bond