Home
Class 12
BIOLOGY
Assertion : Gram-negative bacteria do no...

Assertion : Gram-negative bacteria do not retain the stain when washed with alcohol.
Reason : The outer face of the outer membrane of Gram-negative bacteria contains lipopolysacharides, a part of which is integrated inot the membrane lipids.

A

(A)

B

(B)

C

(C )

D

(D)

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • KINGDOM MONERA (THE PROKARYOTES)

    DINESH PUBLICATION ENGLISH|Exercise CHECK YOUR GRASP|20 Videos

  • KINGDOM MONERA (THE PROKARYOTES)

    DINESH PUBLICATION ENGLISH|Exercise CHECK YOUR GRASP|20 Videos

  • KINGDOM FUNGI-MULTICELLULAR DECOMPOSERS

    DINESH PUBLICATION ENGLISH|Exercise CYG|19 Videos

  • KINGDOM PLANTAE OR METAPHYTA

    DINESH PUBLICATION ENGLISH|Exercise CYG|20 Videos

Similar Questions

Explore conceptually related problems

Assertion .Gram negative bacteria do not retain the when washed with alcohol. Reason . The outer face of outer membrane of Gram negative bacteria contain lipopolysaccharides a part of which is integrated with membrane lipids.

The bacteria which do not retain the crystal violet of iodine stain when after washing with alcohol are included in

Which of the following statement is wrong about gram negative bacteria ?

Assertion:The resting membrane of the neuron exhibits polarity of charges Reason:The outer surface of the axonal membrane possesses a negative charge while its inner surface becomes positively charged.

When outer surface of the axonal membrane possesses a positive charge while its surface is negatively charged is called

Bacteria which retain purple colour after staining with Gram stain is

Read the assertion and reason carefully to mark the correct option in question. Assertion: In the cell membrane , the non-polar tail of saturated hydrocarbons is protected from the aqueous environment. Reason: The lipids are arranged within the membrane with polar head towards the outer sides and the hydrophobic tail towards the inner part.

Which of the given statements are correct ? (i) Bacillus subtilis is a Gram (+ve) bacteria. (ii) Escherichia coli is a Gram (-ve) bacteria. (iii) Washing of the Gram's stain in Gram (-ve) bacteria is due to high lipid content of the cell wall, which gets dissolved in organic solvents like acetone.

Select incorrect statement for bacterial flagella : Option 1 The filament is a hollow rigid cylindrical structure made of the protein called tubulin. Option 2 The filament measures about 20 nm in diameter and 1 −70 nm in length. Option 3 The basal body is the most complex part of the flagellum and consists of four rings connected to a central rod in Gram-negative bacteria. Option 4 Filament rotate by 360 ∘ rather thane undulating back and forth like a whip.

Assertion (A) Penicillin (G) is an antihistamine. Reason (R) Penicillin (G) is effective against gram positive as well as gram negative bacteria.