Question

multiple choice question
the polysaccharide found in a sea alga that is commonly used to prepare solid culture media is called ______.
options: peptone, gelatin, agar, starch.
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Explanation:

To solve this, we analyze each option:

• Peptone is a protein hydrolysate, not a polysaccharide from sea algae.
• Gelatin is a protein - derived substance, not a polysaccharide from sea algae.
• Agar is a polysaccharide obtained from seaweed (sea algae) and is widely used to solidify culture media in microbiology.
• Starch is a polysaccharide from plants like potatoes or corn, not from sea algae for culture media solidification.

Answer:

C. agar