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Mitochondria are one of the three eukaryotic organelles that have a double membrane (along with chloroplasts and the nucleus), two of which are believed to have evolved from bacteria (mitochondria from Pr...
A lipid myelin sheath is wrapped around the axon of the neurone in SEGMENTS. Only the parts of the axon exposed contain Na/K channels that will participate in the conducti...
In the mitotic cell cycle, during the synthesis stage of interphase the DNA is replicated in each chromosome histone protein. In the first stage of mitosis, prophase, the chromosomes become visible due to...
There are three key factors affecting rate of photosynthesis at GCSE level. They are light intensity, CO2 concentration, and temperature. These factors are best visualised by drawing graphs with rate of p...
This cycle can be split into two big parts: the interphase and the dividing phase. The interphase consists of the G1, S and G2 phase. In the G phases the cell increases in size to prepare for the division...
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