Agar

Agar is a jelly-like substance made from red algae. It consists of agarose and a mixture of molecules known as agaropectin.

You can grow bacteria on agar plates: that is how bacteria are laid out for testing in hospital pathology departments. It is used as a place to grow bacteria in an microbiology laboratory.Smith A. 2005. History of the Agar Plate. Laboratory News.   

Domestically, it is used to make desserts, as a laxative, and in the process of brewing. 

The word "agar" comes from the Malay word agar-agar, a word which is used for "red algae", where the jelly comes from.

 References 

Category:Polymers
Category:Microbiology
Category:Laboratory equipment

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