Chlorophyll

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

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Meiosis

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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...

Coenzyme A

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

Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

Bacteria (advanced)

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

ADP, ATP

ATP is the main source of energy for cells.

The structure of prokaryotic and eukaryotic cells

There are two basic cell types: prokaryotic and eukaryotic cells.

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