Question

The cell wall material present both in blue green algae and bacteria is

• A. Pectin
• B. Chitin
• C. Muramic acid
• D. Cellulose.

Answer 1

Answer: (C)

Muramic acid

Answer 2

In the cell wall of blue-green algae and bacteria, there are two important sugar derivatives which are not found anywhere else, i.e., NAG and NAM ($N$-acetyl glucosamine and $N$-acetyl muramic acid), besides a-alanine, $D$-alanine, glutamic acid and diaminopimelic acid.