SPRING FINAL

Which scientist conducted tests on extracts made of bacteria to show that the genetic material in bacteria is DNA?

• Martha Chase

• Oswald Avery

• Frederick Griffith

• Alfred Hershey

What did Hershey and Chase know about bacteriophages that led them to use these viruses in their DNA experiments?

• Bacteriophages are made up of a protein coat surrounding DNA.

• Sulfur in all bacteriophages is radioactive.

• Protein from bacteriophages entersbacteria.

• Bacteriophages have no DNA of their own.

The main difference between the four nucleotides that make up DNA is that they have different

• sugars.

• uracil

• bonds

• bases

Which scientists figured out the three-dimensional structure of DNA by using a model of metal and wood?

• Hershey and Chase

• Watson and Crick

• Pauling and Franklin

• Chargaff and Griffith

In humans, where does DNA replication take place?

• cytoplasm

• ribosome

• nucleus

• Vacuole

During replication, the function of the enzyme DNA polymerase is to

• bind nucleotides together.

• send messages.

• receive messages.

• locate replication sites

The central dogma states that information flows from

• RNA to DNA to polysaccharides.

• DNA to RNA to proteins.

• RNA to DNA to proteins.

• DNA to polysaccharides to RNA

During transcription, what does messenger RNA do?

• It delivers DNA’s instructions for making proteins.

• It constructs proteins out of random amino acids.

• It strings together two complementary DNA strands.

• It strings together two complementary RNA strands.

After examining the DNA of different organisms, which of the following did Erwin Chargaff conclude about the four bases?

• A = T and C = G.

• A = C = G = T.

• A = C and G = T.

• none of the choices are correct

he DNA double helix model used today is the product of research done by scientists

• Hershey and Chase.

• Watson and Crick.

• Pauling and Franklin.

• Chargaff and Griffith.