Home › AP Biology › Biology › DNA Structure and Function › The follow-up experiment that identified the tra…
The follow-up experiment that identified the transforming principle showed transformation failed when which molecule was degraded?
AProtein
BLipids
CThe DNA
DThe RNA
Answer & Solution
Correct answer: C. The DNA
1. Enzymes that specifically degraded each component were used, and each mixture was then tested separately on the R strain.
2. If a component were the transforming principle, destroying it would abolish transformation.
3. They found that when DNA was degraded, the resulting mixture was no longer able to transform the bacteria.
4. All of the other combinations were still able to transform the bacteria, so DNA had to be the carrier.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 14 'DNA Structure and Function', sections 14.1-14.6_
Related questions
A limitation of Sanger's original sequencing method is that it can read:Rosalind Franklin did not share the Nobel Prize for the DNA structure because:The phosphodiester bond of the DNA backbone joins which two carbons?How many base pairs are there in one complete turn of the DNA helix?Each base pair sits how far from the next along the helix?Purines differ from pyrimidines structurally because purines have:The two strands of a DNA double helix are antiparallel, meaning one runs 5' to 3' and the In the Hershey and Chase centrifugation, the heavier bacterial cells ended up in the: