Oct 26
2.5 Elements in biological molecules
recall the chemical elements present in carbohydrates, proteins and lipids (fats and oils)
Carbohydrates
- Elements present in carbohydrates are carbon hydrogen and oxygen
- Carbohydrates include simple sugars and the larger molecules are polysaccharides such as starch
Proteins
- Elements present in proteins are carbon hydrogen oxygen and nitrogen
- Protiens simple molecules are amino acids and the larger molecules are the proteins (as both amino acids and proteins have 'n's in it it is an easier way to remember that nitrogen is a element in protein)
Lipids
- Elements present in lipids are carbon hydrogen and oxygen (as you can see they are the same as carbohydrates however the structure and formula are very different)
- Lipids can be divided in to two groups: the fat (animals) and the oils(plants)

