How Does pH Affect Amylase Activity?

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In summary, the conversation discusses a coursework assignment on investigating the effect of pH on the enzyme amylase. The person asks for suggestions on how to conduct the experiment and specifies a need for quantitative results. Some possible equipment and methods are suggested, including using spit, bread, lemon juice/vinegar, water, and an alkaline solution. It is also recommended to use an iodine solution to test for the presence of glucose. However, there is concern that iodine may not give accurate enough readings, and instead, using stronger acid and base solutions is suggested. Lastly, it is noted that salivary amylase works best in a pH range of 6.0-8.0.
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GaMeR4LyF
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Hi guys, i have been set some coursework by school on the investigation of the effect of pH on the enzyme amylase. I am abit lost right now only just started A levels. Can someone suggest how i would carry out this investigation? Equipment and method would be much appreciated! And the results need to be quantitative and not qualitative.
 
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ahh my bad wrong board
 
  • #3
well you could use your spit (contains the enzyme) , pieces of bread (substrate) ,lemon juice/vinegar (to provide acidic medium) ,water (ph7.7 preferably distilled water),and an alkaline solution.To test to see if glucose has been produced use an iodine solution.
Blue-black colour indicates that the result is positive.equipment needed : petri dishs :smile:
 
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  • #4
hmmm...problem with iodine is that it doesn't give accurate enough readings to differenciate between the samples
 
  • #5
Try using a stronger acid and a stronger base. Remember salivary amylase works best in a range of +/- 6.0 - 8.0 .:smile:
 

FAQ: How Does pH Affect Amylase Activity?

How does pH affect the activity of amylase?

The activity of amylase is highly dependent on the pH of its environment. Amylase works best in a slightly acidic or neutral environment, with an optimal pH range of 6.5-7.5. At extreme pH levels, the enzyme's activity decreases significantly.

What happens to amylase at low pH levels?

At low pH levels, amylase becomes denatured and loses its shape, which affects its ability to bind to substrates and catalyze reactions. This results in a decrease in enzyme activity and a slower rate of reaction.

How does amylase perform at high pH levels?

At high pH levels, amylase also becomes denatured, causing a decrease in enzyme activity. Additionally, the enzyme's active site may become too alkaline, preventing it from effectively breaking down starch molecules.

Can enzymes work at any pH level?

No, enzymes have specific optimal pH ranges in which they can function effectively. Outside of this range, their activity decreases and they may become denatured. This is why maintaining the correct pH is important in many biological processes.

How can pH affect the rate of enzyme activity?

Changes in pH can affect the rate of enzyme activity by altering the enzyme's shape and ability to bind to substrates. An optimal pH allows for maximum enzyme activity, while a pH that is too high or too low can decrease the rate of reaction.

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