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20 Cards in this Set

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  • Back
What elements do protein contain?
Carbon
Hydrogen
Oxygen
Nitrogen
sometimes sulphur.
What are the building blocks of proteins?
Amino acids.
What do amino acids always contain?
Amino group
Carboxylic acid group.
Are amino acids soluble in water?
Yes - readily.
What bonds form proteins?
Pepitide bonds.
2 amino acids join together to form .....
Dipepitide.
A condenstation reaction.
Proteins are complex structures - 4 different levels.....
Primary
Secondary
Tertiary and
Quaternary.
Primary refers to the ....... or ...... of ...... .....
sequence or order
amino acids.
The secondary structure of the protein refers to the ....
patterns contained within the amino acids chains.
Common types of secondary structure proteins are.....
helix - a spiral
pleated sheet - flat structure, 2 or more amino acid chains running parallel.
The tertiary structure of a protein is it's overall.....
three-dimensional shape.
Tertiary structure is maintained .....
disulphide bridges - covalent bonds.
Disulphide bridges contribute to .......
strength.
Final 3D sructure of proteins result in 2 main classes of protein..... .......
Fibrous
Globular.
Fibrous proteins contain ..... that bind together to form long fibres or sheets.
polypeptides
Fibrous are ...... in water.
insoluble
Globular are usually molecules with complex ..... and ....... structures.
tertiary
quaternary
Globular are ...... in water.
soluble
Tertiary or quaternary structure breaks up, changing the shape of the molecule. This is called?
Denaturation.
What are some proteins particularly sensitive to?
pH