What are Monosaccharides?
Single sugars which contain different numbers of carbon atoms.
What are Disaccharides?
Carbohydrates that contain two monosaccharides residues.
What are Polysaccharides?
Very large molecules and contain many monosaccharide residues. Starch is a polysaccharide.
Macromolecules are built up from much smaller molecules, what are these building blocks called?
Protein is digested into..
Starch is digested into..
Fats are digested into..
A mixture of fatty acids and glycerol
The bond forms between carbon 1 of one α- glucose molecule and carbon 4 of the other and is called a
Define reducing sugars
Any sugar that reacts positively with Benedict's solution and hence is oxidized by Benedict's solution is called a reducing sugar.
Define non-reducing sugar
Sugars that do not give an orange precipate (positive reaction) to Benedicts Solution. eg, Sucrose
What is Amylose?
A long chain of α-glucose molecules which is linked by glycosidic bonds.
What can we obtain from a Biuret reaction?
Enables us to test for proteins.
What is th bond formed between two amino acid residues?
When many amino acids are joined this way they form an unbranched chain called..
Hydrogen Bonds are formed..
They are formed between R groups of a variety of amino acids.
Disulphide Bonds are formed..
They are formed between amino acids that contain sulohur in their R groups.
Bacteria cells are often described as..
How to calculate magnification..
Magnification = Length of drawing/Length of specimin object
What are the advantages of using a light microscope?
- Its mobile, it moves around
- It doesn't kill living organisims
- You can see natural colours
- Its cheap
What are the disadvantages of using a light microscope?
- You can't see some parts of of the cell
- It's resolution is not that great
- It's magnification is not that high
What are the advantages of using an electron microscope?
- It has a high resolution
- It has a high magnification
- It shows a clearer image of what is being looked at
What are the disadvantages of using an electron microscope?
- Its expensive
- It kills living cells
- Natural colours cant be seen
- It cant be moved around