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The method in which DNA replicates is called semi-conservative replication. Firstly, DNA helicase catalyses the break down of the hydrogen bonds between the base pairs in the DNA molecule. This partially ...

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...