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This is a form of movement of molecules. This is the movement of molecules from an area of low concentration to an area of high concentration (against the concentration gradient) across a membrane. As it ...

Meiosis is a mechanism of sexual cell division used to generate gametes, or sex cells, in reproductive organs. For example, generation of eggs in ovaries. By contrast, mitosis is an asexual method of cell...

The electrical beating of the heart is controlled by the cardiovascular control centre located within the medulla oblongata within the brain. Heart rate is controlled by the frequency of impulses being se...

There are four levels to a protein's structure:Firstly, the primary structure which is the sequence of amino acids linked by peptide bonds. This level determines the type/function of the protein by influe...

Both diffusion and osmosis are processes concerning the movement of molecules from an area of high concentration to an area of low concentration, along a concentration gradient. Any type of molecule can m...