BIOL 2100 Exam 5 Practice Questions With Complete
Solutions
__________ can give rise to any type of cell whereas
__________ can give rise to a subset of cell types.
a) embryonic stem cells; adult stem cells
b) adult stem cells; totipotent cells
c) totipotent cells; nerve cells
d) adult stem cells; embryonic stem cells
e) heterozygous cells; homozygous cells Correct Answers a)
embryonic stem cells; adult stem cells
a bacterium can make the amino acid glycine or absorb it from
its surroundings. a biochemist finds that glycine binds to a
repressor protein and causes the repressor to bind to the bacterial
chromosome, turning off an operon. if it is like other similar
operons, the presence of glycine will result in the _____.
a) breakdown of glycine
b) formation of sex pili
c) cessation of the synthesis of glycine
d) inhibition of bacterial cell division
e) production of the repressor protein Correct Answers c)
cessation of the synthesis of glycine
a researcher introduced many copies of a double-stranded RNA
into a culture of mammalian cells and used a florescent probe to
follow it. later she finds that the introduced strands separate into
single-stranded RNAs and she hypothesizes that the molecules is
, acting as an miRNA. which of the following pieces of evidence
would support her claim?
a) the degradation rate of the single strand is slower than that of
other cellular mRNAs
b) the rate of accumulation of the polypeptide encoded by the
target mRNA is reduced
c) the amount of the RNA she introduced increases due to
transcription
d) after separating the strands she introduced shut down all
translation Correct Answers b) the rate of accumulation of the
polypeptide encoded by the target mRNA is reduced
according to the lac operon model proposed by jacob and
monod, what is predicted to occur if the operator is removed
from the operon?
a) the lac operon would be transcribed even in the absence of
lactose
b) only lacZ would be transcribed
c) only lacY would be transcribed
d) neither lacZ nor lacY would be transcribed Correct Answers
a) the lac operon would be transcribed even in the absence of
lactose
all of the following are true regarding induced pluripotent stem
(iPS) cells except __________.
a) iPS cells have been demonstrated to function identically to
embryonic stem cells
Solutions
__________ can give rise to any type of cell whereas
__________ can give rise to a subset of cell types.
a) embryonic stem cells; adult stem cells
b) adult stem cells; totipotent cells
c) totipotent cells; nerve cells
d) adult stem cells; embryonic stem cells
e) heterozygous cells; homozygous cells Correct Answers a)
embryonic stem cells; adult stem cells
a bacterium can make the amino acid glycine or absorb it from
its surroundings. a biochemist finds that glycine binds to a
repressor protein and causes the repressor to bind to the bacterial
chromosome, turning off an operon. if it is like other similar
operons, the presence of glycine will result in the _____.
a) breakdown of glycine
b) formation of sex pili
c) cessation of the synthesis of glycine
d) inhibition of bacterial cell division
e) production of the repressor protein Correct Answers c)
cessation of the synthesis of glycine
a researcher introduced many copies of a double-stranded RNA
into a culture of mammalian cells and used a florescent probe to
follow it. later she finds that the introduced strands separate into
single-stranded RNAs and she hypothesizes that the molecules is
, acting as an miRNA. which of the following pieces of evidence
would support her claim?
a) the degradation rate of the single strand is slower than that of
other cellular mRNAs
b) the rate of accumulation of the polypeptide encoded by the
target mRNA is reduced
c) the amount of the RNA she introduced increases due to
transcription
d) after separating the strands she introduced shut down all
translation Correct Answers b) the rate of accumulation of the
polypeptide encoded by the target mRNA is reduced
according to the lac operon model proposed by jacob and
monod, what is predicted to occur if the operator is removed
from the operon?
a) the lac operon would be transcribed even in the absence of
lactose
b) only lacZ would be transcribed
c) only lacY would be transcribed
d) neither lacZ nor lacY would be transcribed Correct Answers
a) the lac operon would be transcribed even in the absence of
lactose
all of the following are true regarding induced pluripotent stem
(iPS) cells except __________.
a) iPS cells have been demonstrated to function identically to
embryonic stem cells
