CHAPTER 27 Flashcards
- Which one of the following is NOT one of the cellular abnormalities produced by oncogenes:
a. Constitutive activation of a growth
factor receptor
b. Constitutive activation of a signaling
protein
c. Acceleration of DNA catabolism
d. Dysregulation of apoptosis
c. Acceleration of DNA catabolism
- Which one of the following is an example of a tumor sup-pressor gene?
a. ABL1
b. RARA
c. TP53
d. JAK2
c. TP53
- G-CSF is provided as supportive treatment during leuke-mia treatment regimens to:
a. Suppress GVHD
b. Overcome anorexia
c. Prevent anemia
d. Reduce the risk of infection
d. Reduce the risk of infection
- Imatinib is an example of what type of
leukemia treatment?
a. Supportive care
b. Chemotherapy
c. Bone marrow conditioning agent
d. Targeted therapy
d. Targeted therapy
- Which one of the following is FALSE about epigenetic mechanisms?
a. Epigenetic mechanisms control how
genes are expressed and silenced.
b. Micro RNAs can bind to specific
mRNAs and block their translation.
c. Hypermethylation of CpG islands
in gene promoters result in their
overactivation.
d. Histone deacetylases keep chromatin
of target genes in a closed inactive
state.
c. Hypermethylation of CpG islands
in gene promoters result in their
overactivation.
- Which one of the following is NOT a source of hematopoi-etic stem cells for transplantation:
a. Spleen
b. Bone marrow
c. Peripheral blood
d. Umbilical cord blood
a. Spleen
- Which of the following is true of CD45
antigen?
a. It is present on every cell
subpopulation in the bone marrow.
b. It is expressed on all hematopoietic cells, with the exception of megakaryocytes and
late erythroid precursors.
c. It is not measured routinely in flow
cytometry.
d. It may be present on
nonhematopoietic cells.
b. It is expressed on all hematopoietic cells, with the exception of megakaryocytes and
late erythroid precursors.
- What is the most common clinical application of flow cytometry?
a. Diagnosis of platelet disorders
b. Detection of fetomaternal hemorrhage
c. Diagnosis of leukemias and
lymphomas
d. Differentiation of anemias
c. Diagnosis of leukemias and
lymphomas
- Erythroid precursors are characterized by the expression of:
a. CD71
b. CD20
c. CD61
d. CD3
a. CD71
- Antigens expressed by B-LL include:
a. CD3, CD4, and CD8
b. CD19, CD34, and CD10
c. There are no antigens specific for
B-LL.
d. Myeloperoxidase
b. CD19, CD34, and CD10
- In Figure 28.2A, the cell population colored in aqua represents:
a. Monocytes
b. Nonhematopoietic cells
c. Granulocytes
d. Lymphocytes
d. Lymphocytes
- Collection of ungated events:
a. Facilitates comprehensive analysis
of all cells
b. Does not help in detection of
unexpected abnormal populations
c. Allows the collection of data on a
large number of rare cells
d. Is used for leukemia diagnosis only
a. Facilitates comprehensive analysis
of all cells
- Which of the following is true of flow
cytometric gating?
a. It is best defined as selection of a
target population for flow cytometric
analysis.
b. It can be done only at the time of data
acquisition.
c. It can be done only at the time of final
analysis and interpretation of flow
cytometric data.
d. It is accomplished by adjusting flow
rate.
a. It is best defined as selection of a
target population for flow cytometric
analysis.
- Mature granulocytes show the expression of:
a. CD15, CD33, and CD34
b. CD15, CD33, and CD41
c. CD15, CD33, and CD13
d. CD15, CD33, and CD7
c. CD15, CD33, and CD13
- Mycosis fungoides is characterized by:
a. Loss of certain antigens compared
with the normal T cell population
b. Polyclonal T cell receptor
c. Immunophenotype indistinguishable
from that of normal T cells
d. Expression of CD3 and CD8 antigens
a. Loss of certain antigens compared
with the normal T cell population
- During the initial evaluation of flow
cytometric data, cell size, cytoplasmic
complexity, and expression of CD45 antigen are used to define cell subpopulations. Which of the following parameters defines cytoplasmic
complexity/granularity?
a. SS
b. FS
c. CD45
d. HLA-DR
a. SS
- The most important feature of the mature neoplastic B cell population is:
a. The presence of a specific
immunophenotype with expres-sion of
CD19 antigen
b. A clonal light chain expression
(i.e., exclusively k- or l-positive
population)
c. A clonal T cell receptor expression d.
Aberrant expression of CD5 antigen on
CD191 cells
b. A clonal light chain expression
(i.e., exclusively k- or l-positive
population)
- If the DNA nucleotide sequence is
59-ATTAGC-39, then the mRNA sequence
transcribed from this template is:
a. 59-GCUAAU-39
b. 59-AUUAGC-39
c. 59-TAATCG-39
d. 59-UAAUCG-39
a. 59-GCUAAU-39
- Cells with damaged DNA and mutated or
non functioning cell cycle regulatory proteins:
a. Are arrested in G1 and the DNA
is repaired
b. Continue to divide, which leads
to tumor progression
c. Divide normally, producing identical
daughter cells
d. Go through apoptosis
b. Continue to divide, which leads
to tumor progression
- To start DNA replication, DNA polymerase requires an available 39 hydroxyl group found on the:
a. Leading strand
b. mRNA
c. Parent strand
d. Primer
d. Primer
- Ligase joins Okazaki fragments of the:
a. 59 to 39 template strand
b. Lagging strand
c. Leading strand
d. Primer fragments
b. Lagging strand
- A 40-year-old patient enters the hospital
with a rare form of cancer caused by faulty
cell division regulation. This cancer localized in the patient’s spleen. An ambitious laboratory developed a molecular test to verify the type of cancer present. This molecular test would require patient specimens taken from which two tissues?
a. Abnormal growths found on the
skin and in the bone marrow
b. Normal splenic tissue and
cancerous tissue
c. Cancerous tissue in spleen and
bone marrow
d. Peripheral blood and cancerous
tissue in the spleen
b. Normal splenic tissue and
cancerous tissue
- One main difference between PCR and
reverse transcriptase PCR is that:
a. PCR requires primers
b. PCR uses reverse transcriptase to
elongate the primers
c. Reverse transcriptase PCR uses
cDNA as a template
d. Reverse transcriptase PCR
requires ligase to amplify the target
DNA
c. Reverse transcriptase PCR uses
cDNA as a template
- Which one of the following statements
about gel electrophoresis is FALSE?
a. The gel is oriented in the
chamber with the wells at the
positive terminal.
b. A buffer solution is required to
maintain the electrical current.
c. The matrix of a polyacrylamide gel
is tighter than that of an agarose gel.
d. The larger DNA fragments will be
closest to the wells of the gel.
a. The gel is oriented in the
chamber with the wells at the
positive terminal.