Question

All EXCEPT which of the following statements are evidence that DNA, and not protein, is the genetic material in eukaryotes as well as bacteria?

a. UV light is most mutagenic at a wavelength at which DNA and RNA strongly absorb.
b. DNA is located only where the primary genetic function is known to occur.
c. Introduction of a cloned DNA into another organism results in the production of the corresponding protein product.
d. DNA has four nucleotides

Answer 1

Experiments conducted by Martha Chase and Alfred Hershey in 1952 confirmed that DNA, and not protein, is the genetic material in eukaryotes as well as bacteria, based on their study of a bacteriophage. By labeling the DNA and protein in the phage with radioactive phosphorus and sulfur respectively, they found that only the DNA was tagged with radioactive phosphorus when the phage infected the bacterial cell.

Step-by-step explanation:

The experiments conducted by Martha Chase and Alfred Hershey in 1952 provided evidence that DNA, and not protein, is the genetic material in eukaryotes as well as bacteria. Chase and Hershey studied a bacteriophage, a virus that infects bacteria. They labeled the phage with radioactive sulfur to label the protein coat and with radioactive phosphorus to label the DNA. They found that when the phage infected the bacterial cell, only the DNA and not the protein would be tagged with radioactive phosphorus, confirming that DNA was the genetic material.