Question

Assign the following substances to the cell wall, flagella, S-layer and pili of bacteria in proper sequence
(a) Glycoprotein
(b) Fimbrin/pilin
(c) Teichoic acid
(d) Flagellin

• A. c, a, d, b
• B. c, d, a, b
• C. b, d, c, a
• D. c, d, b, a

Answer 1

The correct option is B c, d, a, b

Teichoic acids is a cell wall component of Gram-positive bacteria. It is linked to N-acetylmuramic acid or terminal D-alanine in the crosslinkage between N-acetylmuramic acid units of the peptidoglycan layer. The bacterial flagellum is a long, whip-like projection of a cell. It is made up of the protein flagellin. An S-layer is also called as surface layer. It is a part of the cell envelope of bacteria. It is composed of glycoproteins. A pili is a hair-like appendages. It is composed of pilin protein. The pilin protein is also called as fimbrin.

Thus, the correct answer is 'c, d, a, b.'