MCB 252 Exam 3 Lon Capa Questions
And Answers With Verified Solutions
Already Passed Latest Updated 2025
Which of the following is/are a global response(s) to signaling (or lack of
signaling in some case(s) discussed in lecture? Select the best single answer.
Answer: Cell survive, cell grow and division, cell differentiation, and
apoptosis
Which of the following is correct with regard to the two statements below?
i = Adult stem cells are pluripotent.
ii = When a stem cell divides one of the two resulting cells is a stem cell.
Answer: i is FALSE, and ii is TRUE.
In Xenopus laevis, proper tissue development requires which of the following?
Answer: All of the above (regulated cell division, signaling between cells, and
apoptosis)
As discussed in lecture, apoptosis can occur in response to what? Select the
best single answer.
Answer: Signaling in normal development and cellular damage, especially
DNA damage
As discussed in lecture, approximately how many cell types are there in
human cells, at least for our comparative purposes this semester? Choose the
best single answer.
Answer: 210
Approximately how many cells are there in the human body?
Answer: 10^14
What determines the shape of a eukaryotic cell?
Answer: The shape of the cytoskeleton
From which germ layer does the neural tube form during Xenopus
development?
Answer: Ectoderm
, Which of the two statements below is/are TRUE, and which is/are FALSE?
i = Exon shuffling occurs at the level of DNA in the genome; whereas, splicing
occurs at the level of RNA.
ii = In lecture, we discussed the modular construction of some genes and the
evolution of genes (and proteins) by the addition of domains. As described in
lecture, this process occurs in prokaryotes and eukaryotes.
Answer: i is TRUE, and ii is FALSE.
Which property of eukaryotic gene regulatory regions, as discussed in lecture,
allowed for the evolution of complex regulatory regions?
Answer: That enhancers can act over long distances
Which of the following is/are often properties of protein domains?
Answer: When properly folded, the N- and C- termini often point in opposite
directions.
A version of the figure below was discussed in lecture.
Which of the two statements below is/are TRUE, and which is/are FALSE?
i = α-globin gene A3 is more closely related to myoglobin gene M1 than it is to β-
globin gene B1.
ii = β-globin gene B5 is more closely related to β-globin gene B1 than it is to α-
globin gene A1.
Answer: i is FALSE, and ii is TRUE.
Which of the following statements is/are TRUE, and which is/are FALSE?
i = As described in lecture, a polyclonal antibody contains many different
antibodies, each of which recognizes a distinct epitope on the surface of an antigen.
ii = As described in lecture, when purifying a protein of interest one needs an assay
that is specific for that particular protein.
Answer: Both i and ii are TRUE.
In order to determine the structure of a protein by X-ray crystallography you
need which of the following?
Answer: The protein of interest needs to be purified, and you need to know
the amino acid sequence of the protein of interest.
You are carrying out in vitro chemical reactions using an enzyme that
produces a deadly cyanide gas when you add the substrate for that enzyme.
You have produced a monoclonal antibody and a polyclonal antibody against
your cyanide-producing enzyme. Normally when you work with your enzyme
And Answers With Verified Solutions
Already Passed Latest Updated 2025
Which of the following is/are a global response(s) to signaling (or lack of
signaling in some case(s) discussed in lecture? Select the best single answer.
Answer: Cell survive, cell grow and division, cell differentiation, and
apoptosis
Which of the following is correct with regard to the two statements below?
i = Adult stem cells are pluripotent.
ii = When a stem cell divides one of the two resulting cells is a stem cell.
Answer: i is FALSE, and ii is TRUE.
In Xenopus laevis, proper tissue development requires which of the following?
Answer: All of the above (regulated cell division, signaling between cells, and
apoptosis)
As discussed in lecture, apoptosis can occur in response to what? Select the
best single answer.
Answer: Signaling in normal development and cellular damage, especially
DNA damage
As discussed in lecture, approximately how many cell types are there in
human cells, at least for our comparative purposes this semester? Choose the
best single answer.
Answer: 210
Approximately how many cells are there in the human body?
Answer: 10^14
What determines the shape of a eukaryotic cell?
Answer: The shape of the cytoskeleton
From which germ layer does the neural tube form during Xenopus
development?
Answer: Ectoderm
, Which of the two statements below is/are TRUE, and which is/are FALSE?
i = Exon shuffling occurs at the level of DNA in the genome; whereas, splicing
occurs at the level of RNA.
ii = In lecture, we discussed the modular construction of some genes and the
evolution of genes (and proteins) by the addition of domains. As described in
lecture, this process occurs in prokaryotes and eukaryotes.
Answer: i is TRUE, and ii is FALSE.
Which property of eukaryotic gene regulatory regions, as discussed in lecture,
allowed for the evolution of complex regulatory regions?
Answer: That enhancers can act over long distances
Which of the following is/are often properties of protein domains?
Answer: When properly folded, the N- and C- termini often point in opposite
directions.
A version of the figure below was discussed in lecture.
Which of the two statements below is/are TRUE, and which is/are FALSE?
i = α-globin gene A3 is more closely related to myoglobin gene M1 than it is to β-
globin gene B1.
ii = β-globin gene B5 is more closely related to β-globin gene B1 than it is to α-
globin gene A1.
Answer: i is FALSE, and ii is TRUE.
Which of the following statements is/are TRUE, and which is/are FALSE?
i = As described in lecture, a polyclonal antibody contains many different
antibodies, each of which recognizes a distinct epitope on the surface of an antigen.
ii = As described in lecture, when purifying a protein of interest one needs an assay
that is specific for that particular protein.
Answer: Both i and ii are TRUE.
In order to determine the structure of a protein by X-ray crystallography you
need which of the following?
Answer: The protein of interest needs to be purified, and you need to know
the amino acid sequence of the protein of interest.
You are carrying out in vitro chemical reactions using an enzyme that
produces a deadly cyanide gas when you add the substrate for that enzyme.
You have produced a monoclonal antibody and a polyclonal antibody against
your cyanide-producing enzyme. Normally when you work with your enzyme
