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BIO 93 MIDTERM 2 REVIEW
QUESTIONS AND CORRECT
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DETAILED / VERIFIED
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ANSWERS LATEST UPDATE
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, Which of the following is true concerning photosynthesis and cellular respiration? - ANS
In cellular respiration, glucose is oxidized and oxygen is reduced, while in
photosynthesis, carbon dioxide is reduced and water is oxidized.
Which of the following is true about enzymes? - ANS Enzymes lower the activation
energy for a reaction
Which of the following is true for cellular respiration? - ANS To proceed into the Citric
Acid Cycle oxygen is required
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Which of the following is true for all exergonic reactions? - ANS The reaction proceeds
with a net release of free energy
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If a drug was administered that specifically makes the inner membranes of mitochondria
and thylakoids more permeable to small, charged ions, what would be the effect on ATP
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production? - ANS ATP production would decrease in both plants and animals
What is meant by the description "antiparallel" regarding the strands that make up
DNA? - ANS The 5' to 3' direction of one strand runs counter to the 5' to 3' direction of
the other strand.
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Transcription in eukaryotes requires which of the following in addition to RNA
polymerase? - ANS several transcription factors
Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism.
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Approximately what percentage of the nucleotides in this sample will be thymine? -
ANS 8%
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Suppose you are provided with an actively dividing culture of E. coli bacteria to which
radioactive thymine has been added. What would happen if a cell replicates once in the
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presence of this radioactive base? - ANS DNA in both daughter cells would be
radioactive.
The genetic code is essentially the same for all organisms. From this, one can logically
assume which of the following? - ANS A gene from an organism can theoretically be
expressed by any other organism.
If one strand of DNA is 5'-CGGTAC-3', then the corresponding complementary strand
would
be - ANS 3'-GCCATG-5'