Top answers

What are the main differences between prokaryotic and eukaryotic cells?

I would say the main difference here is that eukaryotic cells (e.g. animal cells) have a nucleus and membrane-bound organelles, whereas prokaryotic cells (bacteria and archaea) have no nucleus and no membran...
SP
Answered by Sophie P. • Biology tutor
15738 Views

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) is...
ER
Answered by Emilia R. • Biology tutor
60017 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 at ...
MM
Answered by Miranda M. • Biology tutor
8454 Views

What is the difference between arteries, veins and capillaries?

Arteries, veins and capillaries are all types of blood vessels. The best way to think about their differences are the roles they play in circulation. So, if we take the systemic circulation as an example (th...
EH
Answered by Elizabeth H. • Biology tutor
76577 Views

Which three things are present in plant and agal cells but not in animal cells? (3)

Cell wall Chloroplasts A permanent vacuole This is a common question. I like to remember it as CVC - Cats Vs Cucumbers - like all the YouTube videos of cats being scared by cucumbers.
CR
Answered by Chris R. • Biology tutor
3681 Views