Multiple choice

Which algae act as a source for the isolation of the laboratory culture medium component like agar?

  1. Brown algae

  2. Red algae

  3. Golden brown algae

  4. Yellow green algae

  5. Diatoms
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The cell walls of most red algae include a rigid inner part composed of microfibrils and a mucilaginous matrix. The matrix is composed of sulphated polymer of galactose called agar, funori, porphysan and carrageenan. These four polymers give the red algae a flexible slippery texture. Agar is a component of the cell walls of several species of red algae. Agar is a mixture of two components; linear polysaccharide agarose and a heterogenous mixture of smaller molecules called agaropectin.

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