Semester 1 Final

In the Hershey Chase Experiment, DNA was labeled with ____, and bacteriophage protein was labeled with _____.

• radioactive phosphorous, radioactive sulfur

• radioactive sulfur, radioactive phosphorous

• codons, anticodons

• DNA Polymerase, RNA polymerase

In the ladder analogy of the DNA molecule, the "rungs" of the ladder are:

• Sugars

• Phosphates

• paired nitrogenous bases

• joined sugar and phosphate

Which of the following best describes the arrangement of the sides of the DNA molecule?

• Twisted

• Antiparallel

• bonded

• alternating

If a DNA molecule is found to be composed of 40% thymine, what percentage of guanine would be expected.

• 10%

• 20%

• 40%

• 80%

The enzymes that break hydrogen bonds and unwind DNA are:

• Primers

• Forks

• Helicases

• Polymerases

DNA replication results in:

• 2 completely new DNA molecules

• 2 DNA molecules that each contain a strand of the original

• 1 new DNA molecule, 1 old molecule is conserved

• 1 new molecule of RNA

During replication, what enzyme adds complimentary bases?

• Helicase

• Synthase

• Replicase

• Polymerase

A nucleotide consists of:

• a phosphate and a base

• a phosphate, and a sugar

• a base and an amino acid

• a phosphate, a sugar, and a base

The sugar in RNA is _____, the sugar in DNA is _______

• deoxyribose, ribose

• ribose, deoxyribose

• ribose, phosphate

• ribose, uracil

Which of the following is found on RNA but not DNA?

• Uracil

• Deoxyribose

• Phosphate

• Adenine