Bacteriology 0 Views 1 Answers
What most likely explains the recovery of live S strain cells from a mouse injected with heat-killed S strain mixed with live R strain cells? A) The S strain fused with the R strain, making it resistant. B) The R strain picked up the S strain DNA, enabling it to produce a capsule. C) The S strain was revived by the presence of the host’s immune system. D) The R strain cells picked up the capsules from the S strain cells.
What most likely explains the recovery of live S strain cells from a mouse injected with heat-killed S strain mixed with live R strain cells?
A) The S strain fused with the R strain, making it resistant.
B) The R strain picked up the S strain DNA, enabling it to produce a capsule.
C) The S strain was revived by the presence of the host’s immune system.
D) The R strain cells picked up the capsules from the S strain cells.
Answered
B) The R strain picked up the S strain DNA, enabling it to produce a capsule: This is an example of horizontal gene transfer, where the R strain gains the ability to produce a capsule by acquiring DNA from the dead S strain.
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BNO Team