The pneumococcal strain used by Griffith in his experiments was…….
a) monotrichous
b) atrichous
c) lophotrichous
d) amphitrichous
Explanation: Atrocious bacteria do not have flagella
F. Griffith found in his experimentation
…….types of Streptococcus pneumonae.
a) two
b) three
c) four
d) many
Explanation: S-type (smooth) and R-type (rough)
Why S-type S. pneumonae bacteria have smooth colony?
a) due to the presence of glycoprotein
b) due to the presence of polysaccharide
c) due to the presence of glycolipid
d) all of these
Why some colonies of S. pneumonae (R-type) have rough appearance?
a) due to the absence of glycoprotein
b) due to the absence of polysaccharide
c) due to the absence of glycolipid
d) all of these
What happens to the mice when they were injected with S-type Streptococcus pneumonae strain?
a) the mice show no ill effect
b) the mice died
c) half mice died half were not affected
d) none of these
What happens to the mice when they were injected with R-type Streptococcus pneumonae strain?
a) the mice show no ill effect
b) the mice died
c) half mice died half were not affected
d) none of these
