ups 2006/2007

Question 1

3 common properties to all monosaccharides and disaccharides

Answer 1

1. sweet
2. soluble in water
3. small crystalline molecule

Question 2

2 importance of glucose

Answer 2

1. major respiration substrate

2. an immediate source of energy in cell

Question 3

2 significance of hydrogen bonding in water.

Answer 3

1. high latent heat of vaporization

2. high surface tension

Question 4

3 nucleotide components

Answer 4

1. pentose sugar
2. nitrogeneous base
3. phosphate group

Question 5

angle between 2 hydrogen atoms in water molecule

Answer 5

104.5

Question 6

the bond between atoms in water molecule

Answer 6

covalent bond

Question 7

unequal charge distribution within a molecule

Answer 7

polar molecule

Question 8

water molecule are held together by

Answer 8

hydrogen bond

Question 9

h bond is …… and represented by …….

Answer 9

weak…..dotted line

Question 10

1 water molecule can form with how many water molecule

Answer 10

form 4 hydrogen bonds with 4 water molecule

Question 11

5 properties of water

Answer 11

1. universal solvent
2. high surface tension
3. high specific heat capacity
4. high latent heat of vaporization
5. maximum density at 4 degree celcius

Question 12

carbohydrate composed of

Answer 12

carbon, hydrogen and oxygen

Question 13

ratio for C,H and O in carbohydrate

Answer 13

1:2:1

Question 14

3 classes of carbohydrate

Answer 14

1. monosaccharides
2. disaccharides
3. polysaccharides

Question 15

disaccharides joined together by what process

Answer 15

condensation(removal of water molecule)

Question 16

cellulose

Answer 16

major component of plant cell wall

Question 17

monomer cellulose

Answer 17

beta glucose

Question 18

bond between cellulose

Answer 18

beta 1,4-glycocidic bond