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CLICKER QUESTIONS
For CAMPBELL BIOLOGY, NINTH EDITION
Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Chapter 17
From Gene to Protein
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Questions prepared by
Louise Paquin
McDaniel College
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Product
The final product of an expressed gene can be
which of the following? Find all of the correct
choices.
a) mRNA
b) tRNA
c) rRNA
d) polypeptide
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Replication, Transcription, Translation
Of the following, which pertain to replication,
transcription, modification, or translation? Each
can be used once or more than once.
origin
anticodon
stop codon
promoter
peptide bond
terminator sequence
P site
tRNA
GTP
spliceosome
amino acid synthetase
Complementarity
The template strand of a given gene includes
the sequence 3′-G C C A C G T A T C A G-5′.
a) What is the sequence of the nontemplate strand?
b) What is the mRNA sequence made?
For each one, be sure to indicate 5′ and 3′
ends.
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Gene Expression
Which of the following is the best example of
gene expression?
a) A frog adapts to variation in its environmental
temperature.
b) Mouse fur color results from pigment formed by
gene-encoded enzymes.
c) DNA is replicated during the S phase of the cell
cycle.
d) The percent of A versus a alleles in a population is
altered by natural selection.
e) Mutation alters the sequence of a region of DNA.
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Genetic Code
These examples
demonstrate the
ability of genes from
one species to be
expressed in a
different species.
This is possible
because of which
property of the
genetic code?
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Transcription
Describe what is
occurring at each of
the stages of
transcription (1, 2, 3
in the figure).
How does each stage
move the process
forward?
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Eukaryotic Promoters
What components form the transcription
complex at a eukaryotic promoter?
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Modification
How and where are modifications made to
eukaryotic mRNA before it goes to the cytosol?
What role do snRNPs play?
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Ribosomes
What is represented at
each of the lettered sites,
and what occurs at each
of these sites during
translation?
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tRNA
On this model of a tRNA
molecule, identify each of
the following:
a) 5′ and 3′ ends
b) hydrogen bonds
c) unpaired regions
d) anticodon loop
e) binding site for amino
acid
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Charging tRNA
Aminoacyl-tRNA synthetase is an enzyme
whose function is to ___________.
To do so, it binds a molecule of amino acid and
a molecule of ___________.
After dephosphorylation, which two molecules
are joined?
For the appropriate tRNA to be joined to the
amino acid, what must occur?
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