Griffith Avery and Hershey and Chase

DNA

Page 40

Multiple Choice

Frederick Griffith was trying to find a cure for what disease when he performed his famous bacterial experiment?

• Pneumonia

• Flu

• Cancer

• Headache

Multiple Choice

What type of bacteria did Frederick Griffith use in his experiments on the discovery of DNA as the genetic material?

• Escherichia coli

• Streptococcus pneumoniae

• Salmonella typhi

• Bacillus subtilis

Multiple Choice

Griffith's experiment illustrated a principle where a bacterial cell was changed from one form into another. This process is called ……

• translation

• replication

• transformation

• transcription

Multiple Choice

What was a significant difference between Griffith's experiment and Avery's experiment?

• Griffith accidentally mixed harmless R-strain with heat-killed S-strain; Avery planned to do it.

• Griffith discovered transformation; Avery discovered that DNA was the transforming factor.

• Griffith did not follow the scientific method; Avery did follow every step of the scientific method.

• Griffith was not able to reach a conclusion; Avery concluded that DNA was the genetic material.

Multiple Choice

What is the process that changed rough bacteria to smooth bacteria in Griffith's experiment?

• Inheritance

• Injection

• Conjugation

• Transformation

Pages 42 and 43

Multiple Choice

The Hershey-Chase experiments provided evidence that:

• In DNA the amount of cytosine equals the amount of guanine and the amount of thymine equals the amount of adenine

• DNA is the genetic material of viruses

• Protein is the genetic material of bacteria

• Protein is the genetic material of viruses

Multiple Choice

Which of the following was a conclusion of Hershey and Chase's experiment on the E.coli bacteria?

• ‏The amount of thymine equals the amount of adenine in DNA

• DNA is the genetic material that could be passed from generation to generation in viruses

• The structure of DNA is a double helix

• ‏Determine the basic structure of nucleotide that make up the DNA

Multiple Choice

In the Hershey and Chase experiment, what was the purpose of labeling DNA with radioactive phosphorus (32^{32}32P)?

• To trace the protein coat of the virus.

• To determine whether DNA is the genetic material.

• To identify the bacterial replication process.

• To measure the viral infection rate.

Multiple Choice

Which component of the bacteriophage was left outside the bacterial cells during infection in the Hershey and Chase experiment?

• DNA labeled with 32P.

• Protein coat labeled with 35S.

• RNA

• Bacterial ribosomes.

Multiple Choice

Which label represents the coding part of the DNA in the figure below?

• A

• B

• C

• D

Multiple Choice

The figure below represents the structure of the DNA double strand. If a section of DNA has 30 percent Thymine, how much cytosine will it have?

• 20%

• 30%

• 40%

• 60%

Multiple Choice

If a section of DIVA has 27 percent thymine, how much cytosine will it have?

• 23 percent

• 27 percent

• 46 percent

• 54 percent

Multiple Choice

Which of the following represents the structures (1) and (2) shown in the below figure?

• 1: Nitrogenous base and 2: hydrogen bonds

• 1: Phosphate group and 2: hydrogen bonds

• 1: Nitrogenous base and 2. covalent bonds

• 1: Sugar deoxyribose and 2: peptide bonds

Multiple Choice

Which of the following represents the structures (1) and (2) shown in the below figure?

• (1) peptide bonds and (2) Pyrimidine bases

• (1) peptide bonds and (3) Purine bases

• (1) covalent bonds and (2) Pyrimidine bases

• (1) hydrogen bonds and (2) Purine bases

Multiple Choice

What causes the two sides of the double helix of DNA to stay joined together?

• joining of base pairs

• joining of phosphate molecules

• joining of sugar molecules

• joining of RNA molecules

Multiple Choice

If the structure of DNA were likened to a ladder, what would make up the "supporting structure" (not the "rungs") of the ladder?

• amino acids and sugars

• nucleotide bases, including thymine

• nucleotide bases, including uracil

• sugar-phosphate molecules

Multiple Choice

The figure below represents the five bases of the genetic material. Which of the following represents the right combination of RNA base pairs?

• 4 and 4

• 1 and 3

• 2 and 4

• 1 and 4