biological molecules

Question 1

What are nutrients

Answer 1

chemical substances in food which nourish the body

Question 2

what chemical elements are present in carbohydrates?
formula?

Answer 2

Carbon, hydrogen and oxygen
C6 H12 O6
C H O
- carbon
- hydrogen
- oxygen

Question 3

Structure of carbohydrates:
and examples

Answer 3

Simple sugars:
Monosaccharide: Glucose, fructose

Disaccharide: Maltose, sucrose

Polysaccharide: Starch, glycogen, cellulose

Question 4

what are carbohydrates used for in the body?

Answer 4

Used for respiration by all cells when it is broken down
-carbon dioxide and water in aerobic respiration

Question 5

what chemical elements are present in proteins?

Answer 5

Carbon, hydrogen, oxygen, nitrogen, sulfur
C H O N

Question 6

Basic unit of proteins:

Answer 6

amino acids
eg. enzymes
e.g haemoglobin

Question 7

what chemical elements are present in fats?

Answer 7

Carbon, Hydrogen, Oxygen
C H O

Question 8

Basic unit of fats

Answer 8

Fatty acids and glycerol
eg: lipids
olive oil

Question 9

test for sugars

Answer 9

benedick solution

Question 10

test for starch

Answer 10

iodine solution

Question 11

test for protein

Answer 11

biuret solution

Question 12

test for fat

Answer 12

emulsion test