Top answers

Biology
A Level

Explain why the activity of amylase rapidly decreases above pH 7.

pH 7 is the optimum pH for amylase. This means it performs best and has maximum activity at this pH. Above pH 7, the activity of amylase rapidly decreases beacuse the concentration of H+ ions (or protons)...

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Answered by Emilia R. Biology tutor
59138 Views

What might happen to the rate of glucose production as the temperature of a solution of sucrose and (human) sucrase was raised from 33°C to 43°C and why?

Sucrase is an enzyme that breaks sucrose down to its constituent monosaccharides – glucose and fructose. At 33°C the enzyme will not be working at its’ optimum, as it has evolved to work most efficiently ...

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Answered by Miranda M. Biology tutor
8180 Views

How would you test for the presence of a non-reducing sugar?

We can check for the presence of non-reducing sugars the Benedick's Test. If a reducing sugar is present in a solution, adding Benedick's reagent and heating will form an insoluble red precipitate. Non-re...

JO
Answered by Jess O. Biology tutor
118107 Views

Could you explain the difference between passive diffusion and facilitated transport?

Passive diffusion occurs without any transmembrane proteins being involved, the molecules cross the lipid bilayer following a concentration gradient (from the highest concentration to the lowest). Small u...

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Answered by Eleonore W. Biology tutor
3688 Views

If the concentration of testosterone in a man’s blood starts to rise above normal, this system leads to a reduction in testosterone. How does this occur?

Students are aware of the Hyothalamus-pituitary axis (HPA axis) in the female, but are not as aware about the role of the HPA axis in the male reproductive system. Here,we should start off by explaining t...

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Answered by Thahesh T. Biology tutor
4301 Views

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