MCBM Exam I Questions and Answers 100% CorrectMCBM Exam I Questions and Answers 100% CorrectMCBM Exam I Questions and Answers 100% CorrectMCBM Exam I Questions and Answers 100% CorrectMCBM Exam I Questions and Answers 100% CorrectMCBM Exam I Questions and Answers 100% CorrectReactive oxygen species...
MCBM Exam I Questions and Answers
100% Correct
Reactive oxygen species (ROS) that may damage DNA are often generated by:
A. single stranded DNA
B. the cell's metabolic processes
C.pathogenic, anaerobic bacteria
D.DNA polymerase - ANSWER - B. the cell's metabolic processes
According to your text, thymine is found in DNA instead of uracil because:
A. Nucleic acids containing uracil can only replicate in prokaryotes.
B. Uracil can hydrogen bond effectively with either adenine or cytosine.
C. Uracil does not hydrogen bond with adenine.
D. Frequent cytosine deamination forming uracil would not be caught and corrected. - ANSWER
- D. Frequent cytosine deamination forming uracil would not be caught and corrected.
Adenine, guanine, and cytosine in DNA:
A. are never subject to chemical changes that can lead to permanent mutations
B. may lose an amine group via a variety of pH and temperature-dependent reactions
C. are all subject to depurination
D. can all be easily converted to uracil in a single reaction - ANSWER - B. may lose an amine
group via a variety of pH and temperature-dependent reactions
Telomeres are found on:
a) The ends of eukaryotic chromosomes
, b)Bacterial extrachromosomal DNA
c)In the middle of eukaryotic chromosomes
d) bacterial circular DNA - ANSWER - A) The ends of eukaryotic chromosomes
Select the TRUE statement about DNA Topoisomerases:
a) Topoisomerases reduce torsional stress associated with DNA Replication
B) Topoisomerases reduce torsional stress assocaited with DNA replicaiton
C) Topoisomerases reduce torsional stress associated with DNA replication only in the leading
strand of DNA
D) Topoisomerases reduce torsional stress associated with DNA replication only in the lagging
strand of DNA - ANSWER - B) Topoisomerases reduce torsional stress assocaited with DNA
replicaiton
DNA replication in eukaryotic cells involves:
A) Multiple intitaiton sites
B) Licensing
C) Telomerases
D) Nucleosome assembly
E) All of the above
F) A, C,and D only - ANSWER - E) All of the above
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