Viruses

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

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Bacteria (advanced)

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

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.

Mitosis

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

Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

Coenzyme A

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

What size are bacteria?

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

Meiosis

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

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