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Non- disjunction in meiosis can take place at both anaphase I and II. When there is an error in the separation of homologous chromosomes (anaphase I) or sister chromatids (anaphase II), one of the gametes pr...

There are several simple steps that occur each time a skeletal muscle contracts which follow the sliding filament model. Firstly a nerve impulse travels down a motor neuron releasing neurotransmitter acetylc...

Our body's immune system is responsible for preventing our organism's infection from foreign ones. Any such foreign particle that may trigger an immune response is known as an antigen. What's really impressi...

The light-dependent reaction along with the Calvin cycle (light-independent) make up the process of photosynthesis in organisms such as plants, algae and cyanobacteria. In the light-dependent reaction light ...

Ever since the accidental discovery of Penicillin by Alexandre Fleming in 1928, antibiotics have revolutionised modern medicine. Also known as 'anti-bacterials' they are used to treat often deadly bacterial ...