Enzymes

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

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ADP, ATP

ATP is the main source of energy for cells.

Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

Chlorophyll

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

Coenzyme A

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

Viruses

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

Mitosis

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

Meiosis

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

Transport processes

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

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