Notes on Protein

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What do all amino acid groups have in common?
A carboxyl group and an amino group
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Give three functions of proteins...
Antibodies , Enzymes and transport proteins
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Describe how a dipeptide is formed.
a dipeptide is formed when 2 amino acids join together, by a condensation reaction, ( water molecule being released during the reaction)
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What is the primary structure of a protein?
The primary structure is the sequence of amino acids in the polypeptide chain.
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What is the secondary structure of a protein?
The secondary structure is when the polypeptide coils/ folds in to an alpha helix or beta pleated sheet due to hydrogen bonds forming
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What is the tertiary structure of a protein?
Tertiary structure is when they coil/fold further and more bonds form between different parts of the polypeptide chain. For proteins with a single polypeptide chain this is the final 3D shape.
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What is the quaternary structure of a protein?
For proteins that have more than one polypeptide chain held together by bonds, its the way they are assembled together. its their final 3dshape
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Why is the shape of the protein important?
Because it determines its function.
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Explain the quaternary structure of collagen.
They have 3 polypeptide chains wound together like a rope.The chains are unbranched in primary structure and secondary structure the polypeptide chain is very tightly wound and then twisted into a 2nd helix in the tertiary structure.
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Card 2

Front

Give three functions of proteins...

Back

Antibodies , Enzymes and transport proteins

Card 3

Front

Describe how a dipeptide is formed.

Back

Preview of the front of card 3

Card 4

Front

What is the primary structure of a protein?

Back

Preview of the front of card 4

Card 5

Front

What is the secondary structure of a protein?

Back

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