Biology 1100 - Principles of Biology » Fall 2019 » Week 8 Quiz

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Question #1
The _____ checkpoint assesses whether DNA is damaged, and also whether DNA replication has completed.
A.   G1/S phase
B.   G2/M phase
C.   metaphase
Question #2
During _____ phase the cell replicates its genome.
A.   M
B.   G2
C.   S
D.   G1
Question #3
Which of the following is NOT a trait of HPV that helps it cause cancer?
A.   carries oncogenes
B.   integrates into the host cell's DNA
C.   mutates p53
D.   decreases activity of p53
Question #4
Which characteristic of DNA allows each strand of the molecule to act as a template that specifies the exact sequence of nucleotides in the other strand?
A.   the 2 strands are antiparallel
B.   complementarity of the bases
C.   the 2 strands are held together by hydrogen bonds between the nitrogenous bases
D.   the 2 strands are twisted into a double helix
E.   complementarity of the pentose sugars
Question #5
Why did Hershy and Chase choose to radioactively label the sulfur (S) in the phage's protein coat and the phosphorus (P) in the phage's DNA?
A.   Sulfur and phosphorus are present in both protein and DNA molecules.
B.   Radioactive sulfur readily bonds to the amino groups in proteins, and radioactive phosphorus readily bonds to the 3' hydroxyl group in DNA.
C.   Sulfur is only present in proteins and phosphorus is only present in DNA
D.   Sulfur and phosphorus are the cheapest, safest, and most readily available radioactively labeled isotopes.
Question #6
RuBisCO is essential for photosynthesis, but _____ makes it inefficient.
A.   carboxylation favored under normal conditions
B.   competitive inhibition between O2 and CO2 at the active site
C.   evapotranspiration
D.   reducing potential

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