Proteins

Question 1

What is the primary structure of a protein

Answer 1

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Question 2

Describe the secondary structure of proteins

Answer 2

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Question 3

Describe the tertiary structure of proteins

Answer 3

The alpha helixes of the secondary protein structure can be twisted and folded even more to give the complex and often specific 3-D structure of each protein. This structure is maintained by a number of different bonds, where the bonds occurred depends on the primary structure of the protein. The three bonds are disulphide bridges, ionic bonds, and hydrogen bonds.

Question 4

Describe the quaternary structure of proteins

Answer 4

Made up of two or more polypeptide chains join together sometime. This will also include a prosthetic group.

Question 5

What is the test for proteins?

Answer 5

The buiret at the tests

Question 6

Describe the biuret test

Answer 6

-Place a sample of a solution in a test tube and add equal volume of sodium hydroxide solution
-Add a few drops of dilute, copper sulphate solution and mix
-A purple colour indicates the presence of proteins