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Biology
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Why could a single base mutation stop an enzyme from catalysing a reaction?

Because the single base mutation would change the primary structure of the enzyme which in turn would change the secondary structure of the enzyme due to the differences in hydrogen bonds formed. As a res...

Answered by Biology tutor
2931 Views

Describe how mutations in tumour suppressor genes can lead to the development of tumours

Tumour suppressor genes (TSGs) are genes whose protein products restrain inappropriate cell growth and division. A mutation results in a changed amino acid sequence, which alters the tertiary structure of...

YP
Answered by Yva P. Biology tutor
4579 Views

Explain why there is a change in the rate of blood flow through the digestive system during exercise.

During exercise, there is a higher need for the working muscle to have oxygen for respiration in order to generate energy to carry out its function. Therefore, there is more blood flow required to the mus...

AS
Answered by Ashvin S. Biology tutor
9159 Views

What are the stages of the cell cycle?

Interphase and Mitosis make up the cell cycle.Interphase includes 3 phases- G1- Cell growth phase and this is where cell multiply their organelles and their cytoplasms expand;S phase- DNA synthesis phase ...

JB
Answered by Jade B. Biology tutor
4674 Views

Pathogens are disease-causing organisms which can infect humans. Bacteria and viruses are two examples of pathogens. Explain the differences between bacteria and pathogens and give an example of each.

Bacteria:Contain naked DNAHave a cell wall, membrane and organelles - RibosomesAre cellsLarger than virusesCan survive without living ho...

TG
Answered by Tabitha G. Biology tutor
2740 Views

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