Proteins and Mutations

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  • Created by: Anjelala
  • Created on: 01-11-13 21:49
What are all proteins made out of?
Logng chains of amino acids joined together!
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Examples of the different functions of proteins are...
1) structual proteins used to build cells/tissues like collgen. (2)Hormones, which carry messages to control a reaction like insulin for blood sugar levels.(3) Carrier proteins like haemoglobin which carries oxygen. (4)Enzymes
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Why does each type of protein molecules have a different shape and different functions?
Because each protein has its own number and order of amino acids.
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What are enzymes called biological catalysts?
because they speed up reactions in the body.
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What do enzymes do?
They catalyse chemial reaction happening in respiration,photosynthesis and protein synthesis of living cells.
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What is the lock and key theory?
The substrate molecules fit into the active site of the enzyme (like a key in a lock) to be an enzyme-substrate complex, and then unlock from the active site as product molecules.
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what does specificity mean?
Means that each enzymes can only work on a particular substrate , becuase the substrate has to be the right shape.
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Whn do enzymes work best?
They work best at a certain temperature and ph, this is alled the optimum.
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What is Enzyme activity affected by...
Ph and temperature.
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How does a low temperature affect Enzyme activity?
molecules are moving more slowly so enzyme n substrate are less likely to collide
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How does a high and low ph an a high temperature affect Enzyme activity?
The enzyme active site will be denatured so the substrate can't fit and can't react so quickly.
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When do mutations occur?
Spontaneously, u can be made to occur more often by raidiation or chemicals.
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3 facts about mutations...
1) may lea o production o different proteins (2)often harmfully but could have no effect. (3)could give the individual an advantage.
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What is a mutation?
It changes the order of the four bases .
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If every cell in the body has the same genes, how do different cells perform different functions?
despite the genes being the same, all the same proteins arent made because different genes are switched off in different cells.
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What do mutations do?
They could change or stop production of the protein normally made, because they change the base code of DNA , so cange the order of aino acids in the proteins.
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Card 2

Front

Examples of the different functions of proteins are...

Back

1) structual proteins used to build cells/tissues like collgen. (2)Hormones, which carry messages to control a reaction like insulin for blood sugar levels.(3) Carrier proteins like haemoglobin which carries oxygen. (4)Enzymes

Card 3

Front

Why does each type of protein molecules have a different shape and different functions?

Back

Preview of the front of card 3

Card 4

Front

What are enzymes called biological catalysts?

Back

Preview of the front of card 4

Card 5

Front

What do enzymes do?

Back

Preview of the front of card 5
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