Unit 2 Section 3- Haemoglobin And Carbohydrates Flashcards
How many oxygen molecules can a haemoglobin molecule carry?
Four, one for each harm group on the polypeptide chains
What are the properties of haemoglobin with high affinity for oxygen?
Take up oxygen easily but release it less readily
What are the properties of haemoglobin with a low affinity for oxygen?
Take up oxygen less easily but release more readily
How does partial pressure of oxygen affect haemoglobin?
Oxygen loads onto haemoglobin to form oxyhemoglobin at high partial pressures and unloads the oxygen at lower partial pressures
What is the process by which haemoglobin combines with oxygen?
Loading or associating
What is the structure of a haemoglobin molecule?
Quaternary protein structure containing four polypeptide chains
What are the monomers of carbohydrates?
Monosaccharides such as beta glucose
What type of reactions forms disaccharides and what bond is formed?
Condensation reacting forms a glycosidic bond between two monosaccharides
Name three polysaccharides
Starch, cellulose and glycogen
What is the structure of starch?
Consists of alpha glucose chains which form coiled amylose and branched amylopectin
What are the properties of starch?
Main energy storage material for glucose in plants
Amylose= coiled structure means starch is compact
Amylopectin= branched so enzymes which break down molecule can get to glycosidic bonds easily
Insoluble= doesn’t cause water potential to decrease meaning water doesn’t move in by osmosis and make the cell swell= good for storage
If starch is hydrolysed what is formed?
Alpha glucose
Give an example of a monosaccharide
Alpha glucose
What is glycogen?
The main energy storage material in animals
Where is glycogen stored?
In the liver and muscles as granules
