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It has been suggested that smoking, an epigenetic factor can lead to tumour growth and cancer. Use your knowledge of the epigenome and its structure to explain how this could occur. [5 marks]

Marking Scheme: MP1: Define epigenome- layers of chemical tags covering the DNA and histone protein complex MP2: Increased Methylation of DNA molecule MP3: enzymes attracted to complex/ acetyl groups removed...
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Answered by Hannah H. • Biology tutor
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How do I conjugate the past tense?

Regular verbs in Spanish follow a series of rules which are easy to follow and remember. Forming the past tense follows these rules - easy peasy! You take the stem of the verb and add on certain endings, jus...
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Answered by Anna B. • Spanish tutor
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How and why does Shelia change in An Inspector Calls

J.B Priestley's An Inspector Calls, is a political statements towards the bourgeoise and how they are unacountable for their actions in society. Shelia Birling is the youngest child of Mr Birling. Shelia rep...
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Answered by Chloe M. • English tutor
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The Haber-Bosch process is used in industry to produce ammonia. Explain how the use of high temperature and pressure affects the rate of reaction.

According to collision theory: Increasing the temperature increases the average energy of the system. This means more molecules have enough energy to overcome the activation enthalpy when they collide, causi...
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Answered by Adam W. • Chemistry tutor
4870 Views

Why are there both earthquakes and volcanoes at convergent plate boundaries?

Convergent plate boundaries, also known as destructive plate boundaries, occur when 2 plate boundaries move towards one another due to convection currents in the mantle. The oceanic crust is subducted (force...
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Answered by Alice H. • Geography tutor
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