Search our library of homework questions

Top answers

All subjects

All levels

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 MP...

Answered by Hannah H. • Biology tutor

2551 Views

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 end...

Answered by Anna B. • Spanish tutor

2107 Views

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 ...

Answered by Chloe M. • English tutor

39461 Views

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, ca...

Answered by Adam W. • Chemistry tutor

4106 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 (fo...

Answered by Alice H. • Geography tutor

2702 Views