Explain how oestrogen can lead to the development of breat cancer
Oestrogen is a lipid soluble molecule, so it diffuses into the cell across the plasma membrane. It then binds to a recptor inside the cell and this causes it to relocate to the nucleus. The receptor then acts as a transcription factor inside the nucleus and causes the transcription of genes related to cell growth.
JM
Related Biology A Level answers
All answers ▸Some babies are born with a hole between the right and the left ventricles. These babies are unable to get enough oxygen to their tissues. Suggest why.
Outline how light intensity affects the rate of photosynthesis, with reference to the Calvin cycle and effects on the concentrations of GP, GALP and RuBP.
Why does fetal haemoglobin have a higher affinity for oxygen than an adult haemoglobin?
Aspartic Acid and Proline are both part of the 20 basic amino acids. Describe their similarities and differences in terms of their properties.