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Explain how a substitution mutation could cause an enzyme not to work (5)

The mutation changes the order of bases so there is a different triplet code present. This results in a different amino acid being coded for in the polypeptide chain. This means a different protein with a di...
EC
Answered by Evie C. • Biology tutor
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How does DNA replication take place?

DNA replication takes place by semi-conservative replication (i.e. only half of the strand in each DNA molecule are from the original DNA molecule). First, the enzyme DNA helices is required to break the hyd...
LH
Answered by Laura H. • Biology tutor
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Name and explain the effect of fertiliser runoff into lakes

This process is called eutrophication. Fertiliser is applied to plants because it contains a lot of ammonia and nitrates, which are needed to help a plant grow. However, if too much is applied, especially in...
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Answered by Katy S. • Biology tutor
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What is the difference between osmosis and diffusion?

Both osmosis and diffusion are processes that involve the movement of molecules from an area of high concentration to an area of low concentration. Neither process requires energy. Osmosis and diffusion diff...
HM
Answered by Hope M. • Biology tutor
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Explain the difference between the terms Phenotype and Genotype

A Genotype is a group of genes in your DNA responsible for certain traits. Whereas the Phenotype is a difference in the physical trait seen by an observer.
EK
Answered by Ethan K. • Biology tutor
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