Viruses

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

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Coenzyme A

An acyl-carrier coenzyme taking part in both anabolic and catabolic processes.

Chlorophyll

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

ADP, ATP

ATP is the main source of energy for cells.

Bacteria (spheres, rods, spirals)

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

NAD⁺, NADP⁺, NADPH

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

Meiosis

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

Enzymes

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

Transport processes

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

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