Medical Quiz

Discovery of DNA Quiz


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Avery added an enzyme known to break down and destroy proteins to his heat killed S-strain bacteria, and saw that the R-strain bacteria were ____________________

A. still transformed, and killed the mice.

B. no longer transformed, and the mice lived

C. partially transformed, and the mice got sick but survived.

D. still transformed, but no longer killed the mice


Who discovered that the genetic material in a bacteriophage was DNA?

A. Hershey & Chase

B. Griffith

C. Avery

D. Watson & Crick


This scientist(s) found a “transforming factor” that changed harmless bacteria into harmful bacteria

A. Mendel

B. Avery

C. Chargraff

D. Griffith


In the early 1900s, most scientists thought it was _____________ that carried traits form parent to offspring. 

A. Carbohydrates

B. Lipids

C. Proteins

D. DNA


Oswald Avery and his team built their experimental design off of the original tests performed by _________.

A. Frederick Griffith

B. Hershey and Chase

C. Watson and Crick

D. Erwin Chargaff


In Hershey-Chase exp.,DNA tagging was done by-

A. Radioactive phosphorus P 37

B. Radioactive sulphur S 34

C. Radioactive sulphur S 35

D. Radioactive Phosphorus 32 P


Transformation is

A. Formation of DNA from DNA

B. Formation of mRNA from DNA

C. Foreign DNA entry by Virus

D. Genetic alteration of a cell


Avery added an enzyme known to break down and destroy RNA to his heat killed S-strain bacteria, and saw that the R-strain bacteria were ____________________

A. still transformed, and killed the mice.

B. no longer transformed, and the mice lived

C. partially transformed, and the mice got sick but survived.

D. still transformed, but no longer killed the mice


In Hershey Chase exp.,Protein tagging was done by-

A. Radioactive Phosphorus P37

B. Radioactive sulphur S 34

C. radioactive sulphur 35 S

D. radioactive Phosphorus 32 P


Who originally discovered that bacteria could be changed by the process of transformation although unable to determine what caused the transformation?

A. Griffith

B. Hershey & Chase

C. Avery

D. Franklin


Avery added an enzyme known to break down and destroy DNA to his heat killed S-strain bacteria, and saw that the R-strain bacteria were ____________________

A. still transformed, and killed the mice.

B. no longer transformed, and the mice lived

C. partially transformed, and the mice got sick but survived.

D. still transformed, but no longer killed the mice


What feature did Hershey and Chase use to differentiate between the protein and nucleic acid in their experiment?

A. Proteins have phosphorus and nucleic acids have sulfur

B. Proteins have sulfur and nucleic acids have phosphorus

C. Proteins are single stranded and nucleic acids are double stranded

D. Proteins are double stranded and nucleic acids are single stranded


What is a virus that infects bacteria called?

A. bacteriophage

B. infectious virus

C. transformation

D. gene change


Hershey-Chase exp. confirms that-

A. DNA is always formed from DNA in semiconservative manner.

B. Sulphur and Protein both enter in bacterial cell progeny.

C. DNA is genetic material, not protein.

D. Radioactive Phosphorus was only found in surrounding.


The scientist(s) who settled the debate about whether it was proteins or DNA that was the genetic material of the cell

A. Avery

B. Hershey & Chase

C. Watson & Crick

D. Griffith




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