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Biology
A Level

Describe the process of mitosis

Mitosis is the a form of cell division in which two genetically identical daughter cells are formed. It occurs to grow new tissue e.g. such as skin Before the cell divides it goes through a growth phase w...

OA
Answered by Omolara A. Biology tutor
2112 Views

Explain how changes in temperature and pH affect the rate of an enzyme-catalysed reaction. Give appropriate diagrams to illustrate your answer. [6]

At the optimum temperature for a given enzyme (specific to each enzyme dependent on the composition of the protein), catalytic activity is at a maximum and hence the reaction proceeds at maximum rate. Bot...

JL
Answered by Jasper L. Biology tutor
3438 Views

what is water potential?

Water potential is a measure of the tendency of water to move from one place or compartment to another. Water moves based on the water potential, from a region of higher water potential to a region of low...

VG
Answered by Verity G. Biology tutor
2733 Views

Explain the differences between the lock-and-key mechanism of enzyme action and the induced fit model

The lock-and-key mechanism of enzyme activation involves the active site of the enzyme fitting perfectly with the substrate molecule and the subsequent reaction being catalysed biologically. However, the ...

CO
Answered by Caitlin O. Biology tutor
6966 Views

How can a mutation in a sequence of DNA affect the function of a protein?

Firstly, it is important to recap how DNA codes for synthesis of proteins. mRNA is formed from complementary base pairing to the template strand of DNA in a process called transcription. Every 3 bases wit...

BL
Answered by Ben L. Biology tutor
23033 Views

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