Proteins and Enzymes Unit 2

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  • Created by: Sunset
  • Created on: 13-01-14 13:52
Name two structural proteins
Hair (Keratin) and muscle (actin and myosin)
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Name two important enzyme controlled reactions?
Photosynthesis and Protein Synthesis
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What are proteins made of?
Long chains of amino acids
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What is an enzyme?
A biological catalyst; it speeds up a reaction without being used up
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How do enzymes speed up a reaction?
They lower the activation energy required and therefore increase the number of successful collisions
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What is activation energy?
Th amount of energy needed to start a reaction
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What is the optimum temperature in our bodies?
37C
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What does 'denature' mean?
If an enzyme is heated above a certain temperature, it denatures (changes shape) so it no longer works
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What enzyme is secreted by the salivary gland?
Amylase
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What enzymes are secreted by the pancreas?
Amylase, Trypsin and Lipase
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Where is bile made?
Liver
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Why is bile added to stomach juices?
To neutralise them and provide optimum pH for the small intestine and emulsify fats to speed up fat digestion
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Why are microbes used to obtain enzymes for industry?
Reproduce rapidly, enzymes released from cell so easy to collect, low cost little energy low temps and cheap
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Name one use of proteases in food production.
Pre-digestion of proteins for baby food
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What enzyme is secreted by the stomach?
Pepsin
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How is isomerise used in the food and drink industry?
To turn glucose into fructose as fructose is sweeter so you need less of it in slimming food.
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What is an advantage of biological washing powder?
Work at 50C as enzymes from hot springs but can also work at 30C whilst detergents need higher temps
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Other cards in this set

Card 2

Front

Name two important enzyme controlled reactions?

Back

Photosynthesis and Protein Synthesis

Card 3

Front

What are proteins made of?

Back

Preview of the front of card 3

Card 4

Front

What is an enzyme?

Back

Preview of the front of card 4

Card 5

Front

How do enzymes speed up a reaction?

Back

Preview of the front of card 5
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