Water and carbohydrates

Question 1

What elements are present in the human body

Answer 1

Carbon, hydrogen, oxygen, nitrogen,sulphur, phosphorus, calcium , iron , sodium m potassium, zinc , iodine

Question 2

What % of the human body is water

Answer 2

65-90%

Question 3

4 reasons water is important in humans

Answer 3

Reactant in chemical reactions
Transport medium
Solvent
Temperature control

Question 4

Type of bonding in water

Answer 4

Polar Covent bonding

Question 5

Describe the structure of H2O

Answer 5

H shares 1 electron with 02
Makes one side of H delta positive
Makes the other side of oxygen delta negative

Question 6

What are the 3 main carbohydrates

Answer 6

Monosaccharides -sugar
Disaccharides- sugar
Polysaccharides

Question 7

Define carbohydrates

Answer 7

Contain only: oxygen, carbon, hydrogen
Store energy in plants and animals
Plants cell wall dependant on the structural role of some carbohydrates

Question 8

Glucose + glucose

Answer 8

Maltose + water

Question 9

Glucose + fructose

Answer 9

Sucrose + water

Question 10

Glucose + galactose

Answer 10

Lactose

Question 11

Define Disaccharides

Answer 11

Is a molecule consisting of 2 monosaccharides joined by a glycolic Bond, by a condensation reaction.

Question 12

Define monosaccharide

Answer 12

A molecule consisting of a single sugar

Question 13

Define polysaccharide

Answer 13

A polymer made from many sugar monomers (monosaccharides)

Question 14

What is a monomer

Answer 14

Is a single molecule

Question 15

How is cellulose adapted to there function in plant cells

Answer 15

Long chains
Become linked to form fibrils
Provide strength to cell wall

Question 16

Chemcial elements that make ip biological molecules

Answer 16

C, H, O - carbohydrates
C, H , O - lipids
C, H , O, N, S - proteins
C, H , O, N, P - nucleic acids