Bacteria (spheres, rods, spirals)

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

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Meiosis

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

The structure of prokaryotic and eukaryotic cells

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

NAD⁺, NADP⁺, NADPH

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

Bacteria (advanced)

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

Mitosis

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

Chlorophyll

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

Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

ADP, ATP

ATP is the main source of energy for cells.

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