13 REVIEW 4 DNA TEST

Used heat-killed bacteria and harmless bacteria injected into mice to conclude the transforming factor had to be a gene

• Griffith
• Avery
• Hershey & Chase
• Watson & Crick

Experimented to identify the molecule in the heat-killed bacteria that caused transformation by using enzymes

• Griffith
• Avery
• Hershey & Chase
• Watson & Crick

Used radioactive markers of phosphorus and sulfur to label DNA and proteins of bacteriophages

• Griffith
• Avery
• Hershey & Chase
• Watson & Crick

The process by which one type of bacteria is changes into another type is called

• transcription
• transformation
• duplication
• replication

Bacteriophages are

• a form of bacteria
• enzymes
• coils of DNA
• viruses

Before DNA could definitively be shown to be the genetic material in cells, scientists had to show it could

• tolerate high temperatures
• carry and make copies of information
• be modified in response to environmental factors
• be broken down into subunits

A nucleotide DOES NOT contain

• a 5-carbon sugar
• an amino acid
• a nitrogen base
• a phosphate group

According to Chargaff's rule of base-pairing, which of the following is true about DNA?

• [A]=[T] and [C]=[G]
• [A]=[G] and [C]=[T]
• [A]=[C] and [T]=[G]
• [A]=[T]= [C]=[G]

The bonds that hold the two strands of DNA together come from

• the attraction of phosphate groups for each other
• strong bonds between nitrogenous bases and deoxyribose
• weak hydrogen bonds between the nitrogenous bases
• carbon-to-carbon bonds in the sugar portion of the nucleotides

In prokaryotes, DNA molecules are located in the

• nucleus
• ribosomes
• cytoplasm
• histones