Bacteria (advanced)

Bacteria are unicellular organisms that have no nuclei and are a few micrometres in length

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Bacteria (spheres, rods, spirals)

Bacteria occur in a wide range of shapes, including spheres, rods and spirals.

Enzymes

Enzymes are protein molecules catalysing biochemical reactions. Their activity can be...

Viruses

Viruses consist of protein and DNA or RNA, they reprogram infected cells to produce more...

Chlorophyll

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Meiosis

Our gametes are haploid cells produced from diploid cells by meiosis, a special type of...

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