BIOL133 EXAM 3 EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+
Overexpression of miRNAs can lead to a decrease of protein
expression associated with some forms of cancer. What
could a drug do to counter this effect?
a. increase promoter activity of the miRNA genes
b. decrease expression of RNA polymerase
c. increase expression of RISC
d. decrease expression of miRNA
d. decrease expression of miRNA
What would happen if there were a mutation in the
operator of the trp operon?
a. the trp operon woudl not be able to express the genes
b. the CAP protein couldn't bind, therefore shutting off the
genes
c. the trp operon would continuously express the genes
d. RNA polymerase could not recognize the promoter, so
transcription would not occur
,c. the trp operon would continuously express the genes
If every cell in the body gets the same DNA, how do the cells
of an embryo make different structures and take on
different roles? (Select all that apply.)
a. Different transcription factors are active in different cells.
b. Different transcription factors are encoded in the DNA.
c. Genes are spliced differently in different cells.
d. Translation is regulated so that different cells may make
more of certain proteins.
e. Some cells lack ribosomes while others use them.
f. Cells delete a set of unused genes from their
chromosomes.
a. Different transcription factors are active in different cells.
c. Genes are spliced differently in different cells.
d. Translation is regulated so that different cells may make
more of certain proteins.
A gene is made up of three exons (numbered consecutively)
with two introns (intron 1 between exons 1 and 2 and intron
2 between exons 2 and 3). What would happen if there
were a mutation at the 3' splice site of intron 1?
a. mRNA with all three exons and both introns
b. mRNA with only exons 2 and 3
c. mRNA with all three exons along with intron 1
d. mRNA with exons 2 and 3 along with intron 2
c. mRNA with all three exons along with intron 1
, In eukaryotes, where would a protective modification be
found on mRNA?
a. on the 5' end
b. on the 3' end
c. on both the 5' end and the 3' end
d. on neither the 5' end nor the 3' end
c. on both the 5' end and the 3' end
The portions of the mature mRNA where RNA-binding
proteins can attach in order to change RNA stability are
known as
a. untranslated regions
b. poly-A-tails
c. enhancers
d. codons
e. operators
a. untranslated regions
_________ is the first protein to bind to mRNA to being
initiation of translation.
a. TFIIA
b. eIF-2
c. TFIID
d. 60S ribosomal subunit
e. 40S ribosomal subunit
b. eIF-2
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST
ALREADY GRADED A+
Overexpression of miRNAs can lead to a decrease of protein
expression associated with some forms of cancer. What
could a drug do to counter this effect?
a. increase promoter activity of the miRNA genes
b. decrease expression of RNA polymerase
c. increase expression of RISC
d. decrease expression of miRNA
d. decrease expression of miRNA
What would happen if there were a mutation in the
operator of the trp operon?
a. the trp operon woudl not be able to express the genes
b. the CAP protein couldn't bind, therefore shutting off the
genes
c. the trp operon would continuously express the genes
d. RNA polymerase could not recognize the promoter, so
transcription would not occur
,c. the trp operon would continuously express the genes
If every cell in the body gets the same DNA, how do the cells
of an embryo make different structures and take on
different roles? (Select all that apply.)
a. Different transcription factors are active in different cells.
b. Different transcription factors are encoded in the DNA.
c. Genes are spliced differently in different cells.
d. Translation is regulated so that different cells may make
more of certain proteins.
e. Some cells lack ribosomes while others use them.
f. Cells delete a set of unused genes from their
chromosomes.
a. Different transcription factors are active in different cells.
c. Genes are spliced differently in different cells.
d. Translation is regulated so that different cells may make
more of certain proteins.
A gene is made up of three exons (numbered consecutively)
with two introns (intron 1 between exons 1 and 2 and intron
2 between exons 2 and 3). What would happen if there
were a mutation at the 3' splice site of intron 1?
a. mRNA with all three exons and both introns
b. mRNA with only exons 2 and 3
c. mRNA with all three exons along with intron 1
d. mRNA with exons 2 and 3 along with intron 2
c. mRNA with all three exons along with intron 1
, In eukaryotes, where would a protective modification be
found on mRNA?
a. on the 5' end
b. on the 3' end
c. on both the 5' end and the 3' end
d. on neither the 5' end nor the 3' end
c. on both the 5' end and the 3' end
The portions of the mature mRNA where RNA-binding
proteins can attach in order to change RNA stability are
known as
a. untranslated regions
b. poly-A-tails
c. enhancers
d. codons
e. operators
a. untranslated regions
_________ is the first protein to bind to mRNA to being
initiation of translation.
a. TFIIA
b. eIF-2
c. TFIID
d. 60S ribosomal subunit
e. 40S ribosomal subunit
b. eIF-2
