00:55 = What is cancer? 01:44 = Characteristics of benign tumours 03:12 = Characteristics of malignant tumours 04:29 = Oncogene action/regulation 05:29 = Tumour suppressor gene action/regulation 07:01 = How increased concentrations of oestrogen can increase breast cancer risk 08:19 = Exam questions and mark schemes
So on oncogenes it says that it leads to increased expression as chromatin is less condensed but on tumour suppressor genes it says it will lead to increased expression as chromatin is more condensed? Aren’t they contradicting one another?
Hi! So in the video, I didn't mean that the TSG gene is more expressed , I meant that more tumours are expressed because the expression of the tumour suppressor gene (which normally limits tumour formation) is reduced. Hope this makes sense! :)
@@AlevelBiologyHelp so would it be right to say that hypermethylation decreases expression of tumour suppressor genes, which leads to an increased expressions of tumours?
Hi, is all this information enough for me to do exam questions based on gene expression. As well as, are the definitions AQA based or did you make it yourself>
