Enzymes

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

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Mitosis

Mitosis is the process by which a eukaryotic cell divides into two cells and the number...

Transport processes

This animation explains active and passive transport processes occurring through cell...

Meiosis

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

Bacteria (spheres, rods, spirals)

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

Viruses

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

Chlorophyll

Chlorophyll is a photosensitive green pigment found in plants; it absorbs light energy,...

NAD⁺, NADP⁺, NADPH

NAD⁺ is a coenzyme that plays an important role mainly in catabolic processes, while NADP...

ADP, ATP

ATP is the main source of energy for cells.

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