On the basis of cell wall staining, Hans Christian Gram divided bacteria into …….groups.
a) two
b) three
c) four
d) five
Explanation: 1. Gram negative bacteria and 2. Gram positive Bacteria
What was/were the characteristic/s of
gram-positive bacteria cell wall staining?
a) stained blue-purple with crystal violet
b) retain the dye after washing
c) contain thick wall of peptidoglycan
d) all of these
What was/were the characteristic/s of gram-negative bacteria cell wall staining?
a) stained red with crystal violet
b) lose dye after washing
c) contain thin wall of peptidoglycan
d) all of these
Which of the following bacterial cell wall has outer membrane of lipopolysaccharides?
a) gram-positive
b) gram-negative
c) both a and b
d) none of them
Which of the following bacteria are more resistant?
a) gram-positive
b) gram-negative
c) both a and b
d) none of them
Explanation: it is due to the presence of outer membrane impeding antibiotics
Flagella of bacteria are anchored in the…
a) cell wall
b) plasma membrane
c) capsule
d) cytoplasm
