Search over 10,000 free study notes

The phrase "one gene, one protein" is inaccurate, as shown by the example of haemoglobin: this protein contains prosthetic haem groups which are not made by the activity of any gene, therefore g...

Cell division is split into interphase which encompasses G1, S and G2 phase after which is mitosis which is also split into Prophase, Metaphase, Telophase and Anaphase (PMAT - Pilots Make Arrivals Timely)...

Active transport is the transport of substances against their concentration gradient with the use of energy. Molecules naturally flow down their concentration gradient, ie. from where they are more concen...

As you breathe in, air passes down your trachea and then into the bronchi and bronchioles. The bronchioles divide further into even narrower branches which end in small air filled sacks called alveoli. Th...

For transmission across the synapse to be initiated, an action potential must arrive at the pre-synaptic knob and open voltage- gated ion channels. Once the channels are open, calcium ions are able to dif...