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(SOLVED)What makes DNA and its discovery unique?

(SOLVED)What makes DNA and its discovery unique?

What makes DNA and its discovery unique?

ANSWER:- Overview:
DNA (Deoxyribonucleic Acid) is a molecule that carries genetic information and provides instructions for living organisms’ development and function. The discovery of DNA was a watershed moment in biology, resulting in significant advances in genetics. James Watson and Francis Crick described the structure of DNA for the first time in 1953, revolutionizing our understanding of genetics and paving the way for modern molecular biology.

Concept 13.1- The discovery of DNA as a genetic material.
The semi-conservative model of DNA replication is discussed in Concept 13.2.
The genetic code and the central dogma of molecular biology are concepts 13.3 and 13.4, respectively.
Gene expression and regulation are concepts discussed in Chapter 13.4. What makes DNA and its discovery unique?

In 1928, Griffith conducted experiments on Streptococcus pneumoniae bacteria and discovered that non-virulent bacteria could be transformed into virulent bacteria by exposure to heat-killed virulent bacteria. This was a groundbreaking discovery that demonstrated genetic information transfer between bacteria.


Oswald Avery and his colleagues discovered DNA as the genetic material responsible for bacterial transformation in 1944. They demonstrated that purified DNA could cause bacterial transformation in Streptococcus pneumoniae bacteria.

Alfred Hershey and Martha Chase- In 1952, Hershey and Chase conducted experiments on bacteriophages (viruses that infect bacteria), demonstrating that DNA, not protein, is the genetic material transmitted to progeny phages during infection.

Erwin Chargaff discovered in the late 1940s that the amount of adenine (A) in DNA equals the amount of thymine (T), and the amount of guanine (G) equals the amount of cytosine (C). This observation is known as Chargaff’s rule, and it was crucial in determining the structure of DNA.

Rosalind Franklin- Franklin and her colleagues used X-ray crystallography to obtain an image of the DNA structure in 1952, providing critical insights into the double-helix structure of DNA.

James Watson and Francis Crick- In 1953, Watson and Crick proposed the double-helix structure of DNA, revolutionizing genetics and laying the groundwork for molecular biology.

Conclusion: The discovery of DNA as genetic material was a collaborative effort by many scientists, and unraveling the structure and function of DNA took several decades. The discovery of DNA paved the way for modern molecular biology, transforming our understanding of genetics and evolution. What makes DNA and its discovery unique?

A template strand is a DNA strand that serves as a template for synthesizing a complementary strand during DNA replication.

HeliCase is an enzyme that, during DNA replication, unwinds the double-stranded DNA molecule by breaking the hydrogen bonds between the complementary bases of the two strands. This process is required for DNA replication because it allows replication machinery to access template strands and synthesize new strands. What makes DNA and its discovery unique?
What makes DNA and its discovery unique?


QUESTION:- 3. Go over the Overview.

What makes DNA and its discovery unique?

4. List the following concept titles and explain what they mean.

13.1 Concept-

13.2 Concept

13.3 Concept-

13.4 Concept-

5. Read Concept 13.1 and briefly describe and conclude each of the following scientists’ experiments.

Griffith, Fredrick-

– Oswald Avery

Martha Chase and Alfred Hershey-

Chargaff, Erwin-

Rosalind Franklin is an American actress.

Francis Crick and James Watson-

6. Go over Concept 13.2.

What exactly is a template strand?

What function do helicases play in DNA replication?

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