Biology ISA

  • Created by: amie
  • Created on: 13-03-13 19:14
Title of ISA
Effect of sodium chloride concentration on amylase rate
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Why use syringes rather then measuring cylinders
More Precise
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Why use a starch buffer
Maintain pH, allowing it to stay constant
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Why was this buffer at pH7
optimum pH for amylase
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Why leave test tubes in a water bath for 10 minutes
Bring them all up tot he same temperature as the enzyme amylase
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Why did you keep all the solutions at the same temperature
Same rate of reaction, and also the same number of collisions would occur
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Why is checking the colour change in the iodine to see when the reaction has finished a problem?
Peoples views are different, you could have aspects such as reflection from the light which could give you a bias answer
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Why does amylase only work on starch?
The active site is specific to starch
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How could you make your results more precise?
Smaller intervals and repeat
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how would you calculate the rate from a graph
work out the gradient (y divided by x)
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give 2 symptoms of lactose intolerance
stomach cramps, nausea, diarrhoea, weight loss
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Evaluate means =
PRO's AND CON's
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Other cards in this set

Card 2

Front

Why use syringes rather then measuring cylinders

Back

More Precise

Card 3

Front

Why use a starch buffer

Back

Preview of the front of card 3

Card 4

Front

Why was this buffer at pH7

Back

Preview of the front of card 4

Card 5

Front

Why leave test tubes in a water bath for 10 minutes

Back

Preview of the front of card 5
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Comments

Es.ra

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this is really good!!!!!!!!!!! is this for the aqa biology isa as 2013

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