Proteins

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How many diferent amino acids are there?
500
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Out of 500 amino acids, how many are found in human proteins?
20
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What is an amino acid made up of?
Amino group, (NH2) Carboxyl group (-COOH), R Group
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How are amino acids joined together?
Peptide bond
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What are proteins also known as?
Polypeptides
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What is teh primary structure of a protein?
The sequence of amino acids
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What is the secondary structure of a protein?
Coiling/folding of the amino acid chain (alpha helix/beta pleated sheet/unstructured regions)
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How is the secondary structure held together?
Hydrogen bonds.
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What is the tertiary structure of a protein?
How the secondary structure folds to form the 3D shape
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How many interactions does the tertiary structure involve? (including bonding)
4; Ionic bonds, disulphide bridges, hydrogen bonding, hydrophobic/hydrophilic interactions
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What is the quaternary structure of a protein?
How multiple polypeptide chains are arranged to make a protein.
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What are the two main categories of proteins?
Fibrous and globular
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What is the primary structure of fibrous proteins?
Regular and repetitive, extended
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What is the primary structure of globular proteins?
Random doesn't follow a strict pattern
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What is the secondary structure of a fiberous protein?
Relatively simple
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What is the secondary structure of a globular protein?
Complex
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What makes fibrous proteins suitable for structural roles?
Generally insoluble, less sensitive to pH and temperature changes.
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What makes globular proteins suitable for metabolic roles?
Soluble, more sensitive to changes in pH and temperature (allows reactions to be controlled)
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What is an example of a fibrous protein being used?
Collagen, in arteries, tendons, bones, cartilage
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How many chains of polypeptides is haemoglobin made up of?
4
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How many alpha and beta chains are in haemoglobin?
2 alpha, 2 beta
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What else does haemoglobin contain?
Haem groups
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What do haem groups contain?
Iron ions
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What is the main function of haemoglobin?
To transport oxygen from the lungs to the tissues
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Where does oxygen bind to in a haemoglobin molecule?
Haem group
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Card 2

Front

Out of 500 amino acids, how many are found in human proteins?

Back

20

Card 3

Front

What is an amino acid made up of?

Back

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Card 4

Front

How are amino acids joined together?

Back

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Card 5

Front

What are proteins also known as?

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