Mitosis

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

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The structure of prokaryotic and eukaryotic cells

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

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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...

Enzymes

Enzymes are protein molecules catalyzing biochemical reactions. Their activity can be...

Bacteria (spheres, rods, spirals)

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

Bacteria (advanced)

Bacteria are unicellular organisms that have no cell walls and are a few micrometers in...

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