Question

Match.

Avery and McCarty's - a. discovered that the hereditary system of one strain of bacteria could be transformed by materials from another strain of bacteria

Rosalind Franklin - b. first to discover DNA and isolate it from fish sperm Fred Griffith _ c. in 1944, reported that DNA was the "transforming principle"

Hershey and Chase - d. were the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, was the substance transmitted through generations of cells

Friedrich Miescher - e. obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating structures; also said that DNA had to be helical like a circular stairway

Answer 1

The key figures in the discovery and understanding of DNA were Friedrich Miescher who first isolated DNA; Fred Griffith who demonstrated that DNA could carry hereditary information; Avery, McCarty, and MacLeod who proved DNA was the transforming principle; Hershey and Chase who confirmed DNA as the genetic material; and Rosalind Franklin who provided evidence of DNA's helical structure.

Step-by-step explanation:

Friedrich Miescher was the pioneer in discovering DNA, originally calling it nuclein. Fred Griffith illustrated that DNA could be the hereditary material through his transformation experiments.

Confirming this, Avery and McCarty's experiments showed that DNA was essential for transformation, a view further substantiated by Hershey and Chase with their bacteriophage experiments. Rosalind Franklin's X-ray crystallography provided critical evidence for DNA's helical structure. Collectively, these scientists laid the foundation for our modern understanding that DNA is the molecule responsible for heredity.