1.6 Proteins

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  • Created by: Dane
  • Created on: 30-11-19 15:44
amino acids combine to make...
polypetides
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polypeptides can be combined to form...
Proteins
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Of 100 amino acids how many occur naturally in protien
20
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What are the 4 different types of molecule groups attatched to the carbon of a amino acid
Amino acid group (-NH2), carboxyl group (-COOH), Hydrogen group (-H), R group (-R-) each amino acid has a different 'R' group
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2 amino acids combine to form
Di-peptide bonds
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What type of reaction occurs
condensation reaction
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What type of bond is formed
Peptide bond
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How can a peptide bond be broken and what are it products
Hydrolysis, amino acids
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What is polymerisation
the joining of many amino acid monomers through a series of condensation reactions to form polypeptides
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What forms the primary structure of a protein
The sequence of amino acids in its polypetide chain
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What does the primary structure of a protien determine
its shape and its function
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What are protiens made up of
a number of polypeptide chains
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What groups are included in a peptide bond
C=O, -NH groups
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What type of bonds do they form
weak, hydrogen bonds
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What does this cause the long peptide chain to do
to twist into a 3-D coil know as a a-helix
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What would happen if the chain where to twist somemore
it would give the complex 3-D structure of each protein known as the tertiary structure
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What are the name of the bonds which hold this structure together
disulfide bridges, ionic bonds, hydrogen bonds
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Why is the 3-D shape of a protien important
it affects how it functions its shape is distinctive which allows it to be recognised by other molecules and interact with them in very specific ways
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What other group may be included in the quaternary structure of a protien
Prosphetic
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What are the two basic tyos of protien
Fibrous and Globular
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Describe fibrous protiens with an example
Collagen, have structural functions
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Describe globular protiens with an example
Enzymes and haemoglobin, carry out metabolic functions
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Describe the structure of fibrous protiens polypeptide chains
They form long chains which are parallel to one another. These chains also form cross bridges to make very stable molecules
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Describe the protien structure of fibrous protiens
1.) The Primary structure is unbranched polypeptide chains 2.) In secondary structure the chains are tightly wound 3.) Glycine helps packing 4.) The teriary structure is twisted into a second double helix
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Describe the quaternary protien structure of fibrous protiens
It is made up of three poplypeptide chains wound together in the same way individual fibres are wond together in a rope
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Where is collagen found
In the tendons
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What is the purpose of tendons
Tendons join muscles to the bone
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When a muscle contracts what does the bone do
The bone is pulled in the direction of the contraction
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Other cards in this set

Card 2

Front

polypeptides can be combined to form...

Back

Proteins

Card 3

Front

Of 100 amino acids how many occur naturally in protien

Back

Preview of the front of card 3

Card 4

Front

What are the 4 different types of molecule groups attatched to the carbon of a amino acid

Back

Preview of the front of card 4

Card 5

Front

2 amino acids combine to form

Back

Preview of the front of card 5
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