MCB 150 Exam Questions And Answers With Complete
Solutions
1. the absence of a functional CAP/cAMP complex in E. coli is
an example of negative regulation
2. the observation that glucose can affect an E.coli cell's ability
to use other food sources like lactose is referred to as catabolite
repression.
Determine which of the options below is correct.
-Statements 1 and 2 are both true
-Statement 1 is false; Statement 2 is true
-Statement 1 is true; Statement 2 is false
-Statements 1 and 2 are both false Correct Answers Statement 1
is false; statement 2 is true
A ____ is a section of DNA recognized by a restriction
endonuclease Correct Answers restriction site
A cell has three X chromosomes, but one of those chromosomes
has a large deletion mutation in its Xic. How many Barr bodies
is this cell likely to have?
-0
-1
-2
-3 Correct Answers 1
A CRISPR-Cas system can be used by a bacterial cell for
defense, or a genetic engineer for gene editing. Which step is
,likely to be far more relevant to the genetic engineer than the
bacterial cell?
-Homology-directed repair or Non-homologous end joining
-PAM sequence recognition
-Unwinding of double-stranded DNA
-Attempted matching of crisprRNA/gRNA with target sequence
-Endonuclease activity by Cas protein Correct Answers
Homology-directed repair or Non-homologous end joining
A eukaryotic organelle called a lysosome has an internal pH of
approximately 5. The cytosol surrounding the lysosome has a
pH of approximately 7. This indicates that the proton
concentration inside the lysosome is ____ times ____ than
outside the lysosome Correct Answers 100
higher
A messenger RNA is prepared that codes for a protein in Virus
A. This mRNA is delivered to patients in the capsid of Virus B
to serve as a vaccine. This is an example of a(n)
_______________ vaccine. Correct Answers vector
A mouse with the Avy allele for the Agouti gene presents a dark
brown phenotype. Which of the following best describes the
methylation state of the Agouti gene promoter for this mouse?
-lightly methylated
-moderately methylated
-unmethylated
-highly methylated Correct Answers highly methylated
,A small carbohydrate made of three glucoses would have have
how many oxygen atoms? Your answer should be submitted as
an integer with no decimals. For example, if the answer is four,
enter 4, not four or 4.0. Correct Answers 16
A virus that enters a cell with its genome distributed among two
independent pieces of RNA can most precisely be referred to
as_____ Correct Answers segmented
Arrange the cell/tissue types in order from most likely to be
affected directly by docetaxel to least likely to be affected by
docetaxel.
skeletal muscle, hair, and live Correct Answers hair, liver,
skeletal muscle
Arrange the steps in the replicative cycle of a non-integrating
virus from earliest to latest, beginning with a new round of
infection.
attachment, entry, assembly, release, and synthesis of viral
components Correct Answers -attachment
-entry
-synthesis of viral components
-assembly
-release
As of the writing of this Quest, the virus with the largest
characterized genome is called _______________. Correct
Answers pandoravirus
As the size of a eukaryote's nuclear genome increases, the
number of protein-coding genes increases proportionally.
, -true
-false Correct Answers false
Attenuated vaccine Correct Answers Using a weakened but still
viable form of the pathogen
Catalytic activity can be found in _______________.
- snRNA
Xist
rRNA
SRP RNA
TERC Correct Answers -snRNA
-rRNA
cellulose Correct Answers structural compound used in plants
Cenarchaeum symbiosum is a single-celled organism with no
nuclear membrane, however it shares more in common
genetically and biochemically to H. sapiens than to E. coli. The
scientific community now appreciates that this organism belongs
in its own taxonomic domain because of the contributions of
____
-Carl Woese
-Jennifer Doudna
-Rosalind Franklin
-Neil deGrasse Tyson
-Brad Mehrtens Correct Answers carl woese
chitin Correct Answers structural compound used in animals
Solutions
1. the absence of a functional CAP/cAMP complex in E. coli is
an example of negative regulation
2. the observation that glucose can affect an E.coli cell's ability
to use other food sources like lactose is referred to as catabolite
repression.
Determine which of the options below is correct.
-Statements 1 and 2 are both true
-Statement 1 is false; Statement 2 is true
-Statement 1 is true; Statement 2 is false
-Statements 1 and 2 are both false Correct Answers Statement 1
is false; statement 2 is true
A ____ is a section of DNA recognized by a restriction
endonuclease Correct Answers restriction site
A cell has three X chromosomes, but one of those chromosomes
has a large deletion mutation in its Xic. How many Barr bodies
is this cell likely to have?
-0
-1
-2
-3 Correct Answers 1
A CRISPR-Cas system can be used by a bacterial cell for
defense, or a genetic engineer for gene editing. Which step is
,likely to be far more relevant to the genetic engineer than the
bacterial cell?
-Homology-directed repair or Non-homologous end joining
-PAM sequence recognition
-Unwinding of double-stranded DNA
-Attempted matching of crisprRNA/gRNA with target sequence
-Endonuclease activity by Cas protein Correct Answers
Homology-directed repair or Non-homologous end joining
A eukaryotic organelle called a lysosome has an internal pH of
approximately 5. The cytosol surrounding the lysosome has a
pH of approximately 7. This indicates that the proton
concentration inside the lysosome is ____ times ____ than
outside the lysosome Correct Answers 100
higher
A messenger RNA is prepared that codes for a protein in Virus
A. This mRNA is delivered to patients in the capsid of Virus B
to serve as a vaccine. This is an example of a(n)
_______________ vaccine. Correct Answers vector
A mouse with the Avy allele for the Agouti gene presents a dark
brown phenotype. Which of the following best describes the
methylation state of the Agouti gene promoter for this mouse?
-lightly methylated
-moderately methylated
-unmethylated
-highly methylated Correct Answers highly methylated
,A small carbohydrate made of three glucoses would have have
how many oxygen atoms? Your answer should be submitted as
an integer with no decimals. For example, if the answer is four,
enter 4, not four or 4.0. Correct Answers 16
A virus that enters a cell with its genome distributed among two
independent pieces of RNA can most precisely be referred to
as_____ Correct Answers segmented
Arrange the cell/tissue types in order from most likely to be
affected directly by docetaxel to least likely to be affected by
docetaxel.
skeletal muscle, hair, and live Correct Answers hair, liver,
skeletal muscle
Arrange the steps in the replicative cycle of a non-integrating
virus from earliest to latest, beginning with a new round of
infection.
attachment, entry, assembly, release, and synthesis of viral
components Correct Answers -attachment
-entry
-synthesis of viral components
-assembly
-release
As of the writing of this Quest, the virus with the largest
characterized genome is called _______________. Correct
Answers pandoravirus
As the size of a eukaryote's nuclear genome increases, the
number of protein-coding genes increases proportionally.
, -true
-false Correct Answers false
Attenuated vaccine Correct Answers Using a weakened but still
viable form of the pathogen
Catalytic activity can be found in _______________.
- snRNA
Xist
rRNA
SRP RNA
TERC Correct Answers -snRNA
-rRNA
cellulose Correct Answers structural compound used in plants
Cenarchaeum symbiosum is a single-celled organism with no
nuclear membrane, however it shares more in common
genetically and biochemically to H. sapiens than to E. coli. The
scientific community now appreciates that this organism belongs
in its own taxonomic domain because of the contributions of
____
-Carl Woese
-Jennifer Doudna
-Rosalind Franklin
-Neil deGrasse Tyson
-Brad Mehrtens Correct Answers carl woese
chitin Correct Answers structural compound used in animals
