Viroids and satellites are infectious agents composed

only of

• DNA

• dsDNA

• RNA

• PLASMIDS

Which year Alexander Fleming discovers penicillin..............

Who developed culture media using meat extracts and protein

digests

• Joseph Lister

• Robert Koch

• John Tyndall

• Louis Pasteur

Which ribosomal RNA is present in smaller subunit of prokaryotic ribosome...

• 5SrRNA

• 16SrRNA

• 5.8SrRNA

• 23SrRNA

Pseudomurein differs

from peptidoglycan in that it has ...............

• L-amino acids

• NAG

• D-amino

  acids

• NAM

Thickness of peptidoglycan present in Gram positive bacteria.......

• 20-70nm

• 20-60nm

• 40-80nm

• 20-80nm

Outer membrane is present in .............................bacteria

Techoic acid is present in .......................bacteria

• Gram positive

• Gram negative

The most unusual constituents of the ..................

are its lipopolysaccharides.

0 antigen is chemically a................