In his experiment with streptococcus pneumoniae, Griffith found that

• The DNA of the heat killed S bacteria entered some of the R bacteria when mixed.

• The S bacteria were transformed

• The capsule did not protect the bacterium

• Mice injected with the R bacteria always died.

Hershey and Chase used bacteriophage with radioactive labels to determine genetic material is made up of

• Proteins

• RNA

• DNA

• Bacteriophage

In the Hershey and Chase experiment they used radioactive phosphorus to trace the _?_ and radioactive sulfur to trace the _?_.

• DNA, Protein

• Protein, DNA

• Bacteriophage, e-coli

• E.coli, Bacteriophage

A microorganism's ability to cause disease is known as its

• Vaccine

• Adaptability

• Transformation

• Virulence

What is the name of the process that was involved in changing Griffith’s R bacteria into S bacteria?

• DNA replication

• Transformation

• Crossing-over

• Polymerization

A base that forms bonds with Cytosine is

• Guanine

• Adenine

• Thymine

• Uracil

Two strands of nucleotides winding around each other like a twisted ladder is known as a

• Double helix

• Helicses

• Pyrimidine

• Deoxyribose

DNA consists of a 5 carbon sugar called

• Ribose

• Deoxyribose

• Cytosine

• Uracil

What two alternating molecules make up the backbone of the DNA strand?

• Purine & Pyrimidines

• Adenine & Thymine

• Sugar & Phosphate

• Cytosine & Guanine

A DNA nucleotide does not include a

• 5 carbon sugar

• Double helix

• Phosphate group

• Nitrogen base