Biol 2321 Microbiology Exam 2 || Top Grade Assured.
Binding of tryptophan to the ________ makes a holorepressor.
a. aporepressor
b. corepressor
c. repressor
d. inducer
e. activator correct answers a. aporepressor
Mutations that occur even in the absence of an added mutagen are known as ________
mutations.
a. spontaneous
b. silent
c. missense
d. nonsense
e. frameshift correct answers a. spontaneous
The value of studying a transcriptome rather than a genome is that
a. RNA is much easier to work with than DNA.
b. bacterial RNA have a half life longer than bacterial DNA
c. one can get a snapshot of what genes are expressed under some conditions but not others.
,d. a transcriptome represents the collection of all proteins present in the cell
e. deep sequencing can only be performed on RNA. correct answers c. one can get a snapshot of
what genes are expressed under some conditions but not others.
Using the genetic code shown below, find the correct start and stop codons. Which of the
following peptides might this message code for?
(refer to pdf for image)
5'-GAGUUAUGGGUUCUCUGUGUUGA-3'
a.
GLU-LEU-CYS-MET-GLY-SER-MET-CYS
b.
MET-GLY-SER-LEU-CYS
c.
MET-HIS-GLY-PHE-TYR-VAL
d.
MET-CYS-ILE-LEU-GLY-THR-TYR
e.
ASP-VAL-TYR-LEU-GLY-TYR-VAL-LEU correct answers b.
MET-GLY-SER-LEU-CYS
All the cell's expressed RNAs are collectively referred to as the cell's
, a. genome.
b. transcriptome
c. proteome.
d. holoenzyme.
e. ORF. correct answers b. transcriptome
Codons and anticodons
a. are part of tRNA
b. are sequences of DNA three nucleotides long
c. are identical RNA sequences
d. are complementary RNA sequences
e. interact with tmRNA in order to function. correct answers d. are complementary RNA
sequences
An example of vertical gene transfer is the
a. development of many genetically diverse mesorhizobia via incorporation of a 500 kB segment
from a mesorhizobium
b. uptake of beta-lactamase genes by Streptococcus pneumonia
c. transfer of CRISPR spacers to daughter cells during cell division
Binding of tryptophan to the ________ makes a holorepressor.
a. aporepressor
b. corepressor
c. repressor
d. inducer
e. activator correct answers a. aporepressor
Mutations that occur even in the absence of an added mutagen are known as ________
mutations.
a. spontaneous
b. silent
c. missense
d. nonsense
e. frameshift correct answers a. spontaneous
The value of studying a transcriptome rather than a genome is that
a. RNA is much easier to work with than DNA.
b. bacterial RNA have a half life longer than bacterial DNA
c. one can get a snapshot of what genes are expressed under some conditions but not others.
,d. a transcriptome represents the collection of all proteins present in the cell
e. deep sequencing can only be performed on RNA. correct answers c. one can get a snapshot of
what genes are expressed under some conditions but not others.
Using the genetic code shown below, find the correct start and stop codons. Which of the
following peptides might this message code for?
(refer to pdf for image)
5'-GAGUUAUGGGUUCUCUGUGUUGA-3'
a.
GLU-LEU-CYS-MET-GLY-SER-MET-CYS
b.
MET-GLY-SER-LEU-CYS
c.
MET-HIS-GLY-PHE-TYR-VAL
d.
MET-CYS-ILE-LEU-GLY-THR-TYR
e.
ASP-VAL-TYR-LEU-GLY-TYR-VAL-LEU correct answers b.
MET-GLY-SER-LEU-CYS
All the cell's expressed RNAs are collectively referred to as the cell's
, a. genome.
b. transcriptome
c. proteome.
d. holoenzyme.
e. ORF. correct answers b. transcriptome
Codons and anticodons
a. are part of tRNA
b. are sequences of DNA three nucleotides long
c. are identical RNA sequences
d. are complementary RNA sequences
e. interact with tmRNA in order to function. correct answers d. are complementary RNA
sequences
An example of vertical gene transfer is the
a. development of many genetically diverse mesorhizobia via incorporation of a 500 kB segment
from a mesorhizobium
b. uptake of beta-lactamase genes by Streptococcus pneumonia
c. transfer of CRISPR spacers to daughter cells during cell division
