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Bio 115 Final Exam Murray State questions well answered
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Bio 115 Final Exam Murray State questions well answered
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Bio 115 Final Exam Murray Statequestions well answered
Which of the following best defines the term transgenic animal? - correct answer ✔✔an animal
containing a gene from a third "parent," which may even be another species
A DNA fragment with a sticky end that reads -ATTCG will bind with another DNA fragment with a sticky
end that reads ______. ("-" represents paired nucleotides) - correct answer ✔✔TAAGC-
Which of the following techniques is most commonly used to separate and analyze DNA by size? -
correct answer ✔✔Agarose gel electrophoresis
In a recombinant DNA experiment, which enzyme is used to join together DNA fragments by forming
phosphodiester bonds between nucleotides? Recall that this same enzyme joins together Okazaki
fragments on the lagging strand during DNA replication. - correct answer ✔✔DNA Ligase
Which of the following techniques involves hybridizing a cDNA sample to a chip containing thousands of
single-stranded DNA sequences, allowing one to study the expression of thousands of genes
simultaneously? - correct answer ✔✔DNA microarray
Scientists isolate cells in various phases of the cell cycle. They isolate a group of cells that have 1 1/2
times more DNA than G1 phase cells. What is the most likely part of the cell cycle from which these cells
were isolated? - correct answer ✔✔In the S phase of the cell cycle
Which one of the following is not a function of mitosis? - correct answer ✔✔Mitosis helps organisms
Regenerate lost parts
Grow
Reproduce asexually
Repair tissues
ALL OF THE CHOICES ARE CORRECT
,The longest period of a cell's life cycle is - correct answer ✔✔Interphase
The phase of the cell cycle associated with the doubling of the amount of DNA in the cell is - correct
answer ✔✔S
Homeobox genes - correct answer ✔✔are important in development.
are conserved in multicellular animals.
are transcription factors.
encode proteins with a conserved sequence of amino acids.
ALL OF THESE
Which of the following mechanisms is used to coordinate the expression of multiple, related genes in
eukaryotic cells? - correct answer ✔✔A given gene may have multiple enhancers, but each enhancer is
generally associated with only that gene and no other.
The human genome codes for 50,000 to 100,000 proteins, but any given cell might produce only 5,000 to
20,000 different proteins. How is this possible? - correct answer ✔✔Genes are regulated so that not all
genes are transcribed in all cells
Genes associated with embryonic development are known as - correct answer ✔✔homeotic genes
Which of the following is NOT a means of regulating gene expression? - correct answer ✔✔deleting
genes from cells in which they are not needed
A protein's function is dependent on its ______. - correct answer ✔✔shape
Each amino acid is composed of a central carbon that forms covalent bonds with four other
atoms/molecules. These atoms/molecules include all but a(n): - correct answer ✔✔A group
Hydrogen bonding is most important in stabilizing the ________ structure of many proteins. - correct
answer ✔✔Secondary
, The closer together two genes are on a chromosome, - correct answer ✔✔the less likely there will be a
recombination event between them.
Assume that a cross is made between AaBb and aabb plants and that all the offspring are either AaBb or
aabb. These results are consistent with ________. - correct answer ✔✔Complete Linkage
Which of the following statements correctly describes the reason that closely linked genes are typically
inherited together? - correct answer ✔✔They are located close together on the same chromosome.
Genes that are linked - correct answer ✔✔do not assort independently during meiosis
How does the primary transcript in the nucleus of a eukaryotic cell compare to the functional mRNA? -
correct answer ✔✔the primary transcript is larger than the mRNA
A prokaryotic mRNA transcript is - correct answer ✔✔translated as it is being transcribed.
The action of a new drug is unknown, so you test various aspects of eukaryotic cell processes looking for
an effect. You notice that the survival of cells exposed to this drug is very low. Further analysis shows
that some proteins and mRNAs are much longer than they should be. One hypothesis is that the drug
interferes with - correct answer ✔✔transcription termination signals.
spliceosome activity.
BOTH CHOICES A AND B ARE CORRECT
Which one of the following statements about RNA processing is correct? - correct answer ✔✔Ribozymes
may function in RNA splicing.
In the Hardy-Weinberg formula, what does p2 represent? - correct answer ✔✔The frequency of the AA
genotype
In peas, a gene controls flower color such that R = purple and r = white. In an isolated pea patch, there
are 36 purple-flowering plants and 64 white-flowering plants. Assuming Hardy-Weinberg equilibrium,
what is the value of q for this population? - correct answer ✔✔0.80
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