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DNA: The Chemical Nature of the Gene Quiz

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DNA: The Chemical Nature of the Gene Quiz

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Questions and Answers

What was the key question that scientists were trying to answer regarding the substance of inheritance?

What is the substance that carries genetic information and is passed on from generation to generation? (correct)

How do proteins contribute to the inheritance of traits?

What is the chemical composition of DNA?

What is the role of RNA in inheritance?

In 1868, what significant finding did Johann Friedrich Miescher make?

He identified RNA as the carrier of genetic information.

He proved that proteins are responsible for the inheritance of traits.

He demonstrated that the nucleus contains a substance high in phosphorus and slightly acidic. (correct)

He discovered that DNA is the substance of inheritance.

Which of the following statements best describes the flow of genetic information?

DNA → RNA → Proteins (correct)

DNA → Proteins → RNA

RNA → DNA → Proteins

Proteins → RNA → DNA

What is the meaning of the term "dogma" as used in the context of genetics?

A belief or set of beliefs accepted without question or doubt. Signup and view all the answers

Which of the following statements is true regarding the substance of inheritance?

It must encode traits or phenotypes. Signup and view all the answers

Which characteristic of the genetic material is essential for it to be considered the substance of inheritance?

It must be heritable and passed on from generation to generation. Signup and view all the answers

What did Albrecht Kossel demonstrate about DNA composition in 1887?

DNA contains four nitrogenous bases: A, C, G, and T Signup and view all the answers

According to Griffith's Experiment, what is the key finding that supports DNA as the genetic material?

The DNA-destroying enzyme (DNase) destroys the transformation ability of S-debris Signup and view all the answers

In Hershey and Chase's experiment, what substance was injected by the bacterial virus (phage) into the bacteria during infection?

Phage proteins only Signup and view all the answers

What characteristic of Streptococcus pneumonia provided evidence that genetic material is a non-living substance?

The ability of virulent and non-virulent forms to produce smooth or rough colonies Signup and view all the answers

What was Phoebus Aaron Theodore Levene's contribution to understanding nucleic acids in 1919?

Showed nucleic acids are composed of nucleotides with base, sugar, and phosphate group Signup and view all the answers

Erwin Chargaff's finding in 1955 indicated which important characteristic about DNA?

Equimolar amounts of A&T and C&G in DNA Signup and view all the answers