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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Bacteria (advanced)

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

What size are bacteria?

This lesson presents the structure and classification of bacteria and the role they play...

Mitosis

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

NAD⁺, NADP⁺, NADPH

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

Viruses

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

Bacteria (spheres, rods, spirals)

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

The structure of prokaryotic and eukaryotic cells

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

Coenzyme A

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

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