my but need filtering lol
Small, but normal variations in genes may produce proteins that work differently from those of other individuals ( friends or relatives). This may affect how we respond to different medicines. The extent to which these proteins functions varies from one individual to another. Example; certain painkillers only work when body proteins convert them from an inactive form to an active one. If these proteins work too fast, the drug will be eliminated from the body before it has time to work. To do their job the pain killers need to bind and modulate a target body protein, the receptor, such that if the target body protein is altered the pain killer might not be able to bind.
I would say the correct answer is B: <span>People tend to overuse or degrade shared resources. It is often not clear how much exploitative pressure a natural resource can sustain before the exploitation becomes unsustainable. So for example, various industries may dispose of waste into a river. The river has a capacity to absorb and clean a certain amount of effluent by natural degradation systems. However, at some critical mass of pollutants, these natural processes are no longer able to function properly, and the river becomes very polluted to a point were the resource cannot be utilised. Monitoring can help to gauge at which point a common resources is becoming unacceptably degraded, and this can guide policy.</span>
