Sovi.AI - AI Math Tutor

Scan to solve math questions

QUESTION IMAGE

what did hershey and chase discover from their experiments? which bases…

Question

what did hershey and chase discover from their experiments? which bases pair together in dna sequences or series that bacteria and bacteriophages do not have dna that dna, not protein was the transformative factor that the shape of dna was a long series of chains

Explanation:

Brief Explanations

Hershey and Chase conducted experiments using bacteriophages (viruses that infect bacteria). They used radioactive isotopes to label the DNA (with phosphorus - 32) and proteins (with sulfur - 35) of the bacteriophages. When the bacteriophages infected the bacteria, they found that the radioactive phosphorus (associated with DNA) entered the bacteria, while the radioactive sulfur (associated with proteins) remained outside. This showed that DNA, not protein, was the genetic material (transformative factor) that was passed on during the infection process.

  • The discovery of base - pairing (A - T, G - C) was by Watson and Crick based on Chargaff's rules.
  • Bacteria and bacteriophages do have DNA. Bacteria have circular DNA in their cytoplasm (and sometimes plasmids), and bacteriophages have DNA (or RNA in some cases) as their genetic material.
  • The shape of DNA as a double - helix (not just a long series of chains) was discovered by Watson, Crick, Franklin, and Wilkins.

Answer:

that DNA, not protein was the transformative factor