The major criteria used in placing bacteria into different groups is based on differences in
A)cell wall structure.
B)cell membrane permeability.
C)presence or absence of flagella.
D)detergent susceptibility.

Question

Quizplus · Accepted Answer

The major criterion used in placing bacteria into different groups is based on differences in cell wall structure. Bacteria are broadly classified into two groups - Gram-positive and Gram-negative - based on their ability to retain a crystal violet stain in the presence of a decolorizing agent. Gram-positive bacteria have a thick peptidoglycan layer that retains the stain, while Gram-negative bacteria have a thinner peptidoglycan layer and an additional outer membrane that does not retain the stain. Other properties such as cell membrane permeability, presence or absence of flagella and detergent susceptibility may be used to differentiate between bacteria within these two groups.

The Major Criteria Used in Placing Bacteria into Different Groups