Question
Biology Question on loss of biodiversity
The component of bacteria that retains the crystal violet stain during Gram-staining is
A
O-antigen
B
Lipopolysaccharide
C
Peptidoglycan
D
Cytoplasmic membrane
Answer
Peptidoglycan
Explanation
Solution
The stain is retained by the peptidoglycan layer within the cell wall of the bacteria. They are classified into gram positive and gram negative. Gram positive has a thick layer of peptidoglycan, that prevents the stain from washing away. Gram negative on the other hand, has a thin layer of peptidoglycan.