BIO 189A Final Exam Questions With
Correct Answers
In his transformation experiments, what did Griffith observe? - CORRECT
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|ANSWER✔✔-Mixing a HEAT-KILLED pathogenic strain of bacteria with a | | | | | | | | |
living NONPATHOGENIC strain can convert some of the living cells into
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the pathogenic form.
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It became apparent to Watson and Crick after completion of their model
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|that the DNA molecule could carry a vast amount of hereditary
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information in which of the following? - CORRECT ANSWER✔✔-
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sequence of bases | |
-there are three models:| | |
1) Semiconservative (CORRECT)
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2) Dispersive (mixture)
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3) Conservative (3 old, 1 new)
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Once the pattern found after one round of replication was observed,
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Meselson and Stahl could be confident of which of the following
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conclusions? - CORRECT ANSWER✔✔-Replication is not conservative.
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, What is the function of topoisomerase? - CORRECT ANSWER✔✔-
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relieving strain in the DNA ahead of the replication fork
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The leading and the lagging strands differ in that - CORRECT
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ANSWER✔✔-The leading and the lagging strands differ in that | | | | | | | |
In nucleotide excision repair, damaged DNA is excised by what
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enzyme(s)? - CORRECT ANSWER✔✔-Nucleases-enzymes that cut DNA.
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Which of the following represents the order of increasingly higher levels
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of organization of chromatin? - CORRECT ANSWER✔✔-nucleosome, 30-
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nm chromatin fiber, looped domain
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Which of the following modifications is least likely to alter the rate at
| | | | | | | | | | | | |
which a DNA fragment moves through a gel during electrophoresis (DNA
| | | | | | | | | |
fingerprinting)? - CORRECT ANSWER✔✔-altering the nucleotide
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sequence of the DNA fragment without adding or removing nucleotides
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Which of the following statements accurately describes why Taq
| | | | | | | | |
polymerase is used in PCR? - CORRECT ANSWER✔✔-It is heat stable and
| | | | | | | | | | |
can withstand the heating step of PCR.
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Examine the simple metabolic pathway in the figure. A mutation results
| | | | | | | | | | |
in a defective enzyme 1. Which of the following results would be a
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Correct Answers
In his transformation experiments, what did Griffith observe? - CORRECT
| | | | | | | | |
|ANSWER✔✔-Mixing a HEAT-KILLED pathogenic strain of bacteria with a | | | | | | | | |
living NONPATHOGENIC strain can convert some of the living cells into
| | | | | | | | | | |
the pathogenic form.
| |
It became apparent to Watson and Crick after completion of their model
| | | | | | | | | | |
|that the DNA molecule could carry a vast amount of hereditary
| | | | | | | | | | |
information in which of the following? - CORRECT ANSWER✔✔-
| | | | | | | |
sequence of bases | |
-there are three models:| | |
1) Semiconservative (CORRECT)
| |
2) Dispersive (mixture)
| |
3) Conservative (3 old, 1 new)
| | | | |
Once the pattern found after one round of replication was observed,
| | | | | | | | | | |
Meselson and Stahl could be confident of which of the following
| | | | | | | | | | |
conclusions? - CORRECT ANSWER✔✔-Replication is not conservative.
| | | | | |
, What is the function of topoisomerase? - CORRECT ANSWER✔✔-
| | | | | | | |
relieving strain in the DNA ahead of the replication fork
| | | | | | | | |
The leading and the lagging strands differ in that - CORRECT
| | | | | | | | | | |
ANSWER✔✔-The leading and the lagging strands differ in that | | | | | | | |
In nucleotide excision repair, damaged DNA is excised by what
| | | | | | | | | |
enzyme(s)? - CORRECT ANSWER✔✔-Nucleases-enzymes that cut DNA.
| | | | | |
Which of the following represents the order of increasingly higher levels
| | | | | | | | | |
of organization of chromatin? - CORRECT ANSWER✔✔-nucleosome, 30-
| | | | | | | |
nm chromatin fiber, looped domain
| | | |
Which of the following modifications is least likely to alter the rate at
| | | | | | | | | | | | |
which a DNA fragment moves through a gel during electrophoresis (DNA
| | | | | | | | | |
fingerprinting)? - CORRECT ANSWER✔✔-altering the nucleotide
| | | | | | |
sequence of the DNA fragment without adding or removing nucleotides
| | | | | | | | |
Which of the following statements accurately describes why Taq
| | | | | | | | |
polymerase is used in PCR? - CORRECT ANSWER✔✔-It is heat stable and
| | | | | | | | | | |
can withstand the heating step of PCR.
| | | | | | |
Examine the simple metabolic pathway in the figure. A mutation results
| | | | | | | | | | |
in a defective enzyme 1. Which of the following results would be a
| | | | | | | | | | | | |
