In Griffith's transformation experiments,

A) mice infected with heat-killed S form and live R form caused pneumonia and death in the mice.
B) the S form lacked an enzyme involved in the manufacture of the polysaccharide coat, leading to the abnormally smooth colonies.
C) mice infected with live R form caused pneumonia and death in mice.
D) the R form transformed the S form into a virulent variety of the bacteria.


Ans: A) mice infected with heat-killed S form and live R form caused pneumonia and death in the mice.

Biology & Microbiology

You might also like to view...

Pressure increases one atmosphere every ________ meters in the ocean

a. 100 b. 10 c. 30 d. 3

Biology & Microbiology

Part of a DNA gene sequence reads CAT. If a mutation occurs that changes the T to A, will the final protein be affected?

What will be an ideal response?

Biology & Microbiology

Which of the following terms is LEAST related to the other terms?

a) oxygen. b) stomata. c) carbon dioxide. d) transpiration.

Biology & Microbiology

Aquaporins are proteins that facilitate the transport of __________ across the membrane.

Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology