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Mastering Biology CH 17 homework Questions and Answers 2024
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Mastering Biology CH 17 homework
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Mastering Biology CH 17 homeworkWhich of the following terms associated with transcription describe regions of nucleic
acid? - answer promoter
terminator
gene
Place the events in the transcription of a gene in their proper order from left (first event)
to right (last event).
Rank from first event to last event. - answer First event
RNA polymerase binds promoter
RNA polymerase transcribes gene
RNA polymerase reaches terminator
RNA polymerase exits gene, RNA is released
Last event
In the diagram below, the gray unit represents _____. – answer RNA polymerase
In the diagram below, the green unit represents _____. - answerthe promoter
In the diagram below, the two blue strands represent _____. - answerDNA
Which of these correctly illustrates the pairing of DNA and RNA nucleotides? -
answerGTTACG
CAAUGC
The direction of synthesis of an RNA transcript is _____. - answer5' --> 3'
Suppose that a portion of double-stranded DNA in the middle of a large gene is being
transcribed by an RNA polymerase. As the polymerase moves through the sequence of
six bases shown in the diagram below, what is the corresponding sequence of bases in
the RNA that is produced?
Enter the sequence of bases as capital letters with no spaces and no punctuation.
Begin with the first base added to the growing RNA strand, and end with the last base
added. - answerUGAGCC
During transcription in eukaryotes, a type of RNA polymerase called RNA polymerase II
moves along the template strand of the DNA in the 3'→5' direction. However, for any
given gene, either strand of the double-stranded DNA may function as the template
strand.
, For any given gene, what ultimately determines which DNA strand serves as the
template strand? - answerthe base sequence of the gene's promoter
After transcription begins, several steps must be completed before the fully processed
mRNA is ready to be used as a template for protein synthesis on the ribosomes.
Which three statements correctly describe the processing that takes place before a
mature mRNA exits the nucleus? - answerA cap consisting of a modified guanine
nucleotide is added to the 5' end of the pre-mRNA.
A poly-A tail (50-250 adenine nucleotides) is added to the 3' end of the pre-mRNA.
Noncoding sequences called introns are spliced out by molecular complexes called
spliceosomes.
The following eukaryotic structural gene contains two introns and three exons.
The table below shows four possible mRNA products of this gene. Use the labels to
explain what mutation(s) may have resulted in each mRNA.
Drag the correct label to each location in the table. Labels may be used once, more
than once, or not at all. - answersee image
The average length of a transcription unit along a eukaryotic DNA molecule is about
27,000 nucleotide pairs, whereas an averaged-sized protein is about 400 amino acids
long. What is the best explanation for this fact? - answerMost eukaryotic genes and
their RNA transcripts have long noncoding stretches of nucleotides that are not
translated.
What name is given to the process in which a strand of DNA is used as a template for
the manufacture of a strand of pre-mRNA? - answertranscription
What name is given to the process in which the information encoded in a strand of
mRNA is used to construct a protein? - answertranslation
What name is given to the process in which pre-mRNA is edited into mRNA? -
answerRNA processing
Polypeptides are assembled from _____. - answeramino acids
RNA processing converts the RNA transcript into _____. - answermRNA
What is the process called that converts the genetic information stored in DNA to an
RNA copy? - answertranscription
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