AOCN Advanced oncology nursing certification
recognizing specialized knowledge in
comprehensive cancer treatment and evidence-
based practice.
Question 1
Which phase of the cell cycle is primarily responsible for DNA synthesis?
A) G₀ phase
B) G₁ phase
C) S phase
D) M phase
Rationale: The S (synthesis) phase is when the cell replicates its DNA in
preparation for mitosis. Chemotherapeutic agents such as antimetabolites (e.g.,
methotrexate, 5-fluorouracil) are cell-cycle specific and primarily target cells in the
S phase. G₀ is the resting phase, G₁ is the pre-DNA synthesis phase, and M is the
mitotic phase.
Question 2
The tumor suppressor gene p53 most commonly induces which cellular process
when DNA damage is detected?
A) Angiogenesis
B) Apoptosis
C) Metastasis
D) Cellular senescence
Rationale: p53 acts as the "guardian of the genome." When DNA damage is
detected, p53 can trigger apoptosis (programmed cell death) to eliminate cells with
irreparable DNA damage, preventing malignant transformation. Loss of p53
function is one of the most common mutations found in human cancers.
,Question 3
Which hereditary syndrome is most strongly associated with a germline mutation
in the BRCA1 gene?
A) Lynch syndrome
B) Li-Fraumeni syndrome
C) Hereditary breast-ovarian cancer syndrome
D) Familial adenomatous polyposis
Rationale: BRCA1 mutations confer high risk for breast and ovarian cancers and
define the hereditary breast-ovarian cancer syndrome. Lynch syndrome is
associated with DNA mismatch-repair genes (MLH1, MSH2, etc.), Li-Fraumeni
with TP53 mutations, and familial adenomatous polyposis with APC mutations.
Question 4
In hereditary non-polyposis colorectal cancer (Lynch syndrome), which DNA
mismatch-repair gene is most frequently mutated?
A) APC
B) MLH1
C) KRAS
D) BRCA1
Rationale: MLH1 (along with MSH2, MSH6, and PMS2) is commonly mutated in
Lynch syndrome, causing microsatellite instability and increased colorectal and
other cancer risks. APC mutations are associated with familial adenomatous
polyposis, KRAS is an oncogene, and BRCA1 is associated with breast/ovarian
cancer.
Question 5
Epigenetic silencing of tumor suppressor genes is most often due to:
A) Point mutations in coding regions
B) DNA hypermethylation of promoter CpG islands
C) Gene amplification
D) Chromosomal translocation
,Rationale: DNA hypermethylation of promoter CpG islands leads to
transcriptional silencing of tumor suppressor genes without altering the DNA
sequence itself. This is an epigenetic change that can be reversed with
demethylating agents such as azacitidine and decitabine.
Question 6
Which hallmark of cancer describes the ability of malignant cells to avoid
programmed cell death?
A) Sustained proliferative signaling
B) Evading apoptosis
C) Inducing angiogenesis
D) Activating invasion and metastasis
Rationale: Evading apoptosis (resisting cell death) is one of the classic hallmarks
of cancer. Cancer cells develop mechanisms to avoid programmed cell death,
including loss of p53 function, overexpression of anti-apoptotic proteins (e.g., Bcl-
2), and activation of survival pathways.
Question 7
According to USPSTF guidelines, which criterion must be met for lung cancer
screening with low-dose CT?
A) Age 50-75 and ≥20 pack-years, quit within 5 years
B) Age 55-80 and ≥30 pack-years smoking history, currently smoking or quit
within 15 years
C) Age 45-70 and any smoking history
D) Age 65-85 and ≥40 pack-years, quit within 20 years
Rationale: USPSTF recommends annual low-dose CT screening for adults aged
55-80 with a ≥30 pack-year smoking history who currently smoke or quit within
the past 15 years. This evidence-based guideline aims to detect lung cancer at an
early, more treatable stage.
, Question 8
Which screening modality is recommended for average-risk adults aged 45-75 for
colorectal cancer detection?
A) Flexible sigmoidoscopy every 5 years
B) Fecal immunochemical test (FIT) annually
C) Colonoscopy every 10 years
D) CT colonography every 3 years
Rationale: Colonoscopy every 10 years is the gold-standard screening test for
average-risk adults aged 45-75, allowing direct visualization and polyp
removal. While other modalities are acceptable, colonoscopy remains the most
comprehensive screening option.
Question 9
Which lifestyle modification is most effective in reducing the risk of lung cancer?
A) Increasing dietary fiber
B) Smoking cessation
C) Regular physical activity
D) Reducing alcohol consumption
Rationale: Smoking cessation is the single most effective lifestyle modification
for reducing lung cancer risk. Tobacco smoking is responsible for approximately
85% of all lung cancer cases. While diet, exercise, and alcohol reduction are
important for overall health, smoking cessation has the greatest impact on lung
cancer prevention.
Question 10
A 62-year-old heavy smoker is being evaluated for lung cancer screening.
According to USPSTF guidelines, what is the most appropriate recommendation?
A) Annual low-dose CT screening
B) Chest X-ray annually
C) Sputum cytology screening
D) No screening is recommended
recognizing specialized knowledge in
comprehensive cancer treatment and evidence-
based practice.
Question 1
Which phase of the cell cycle is primarily responsible for DNA synthesis?
A) G₀ phase
B) G₁ phase
C) S phase
D) M phase
Rationale: The S (synthesis) phase is when the cell replicates its DNA in
preparation for mitosis. Chemotherapeutic agents such as antimetabolites (e.g.,
methotrexate, 5-fluorouracil) are cell-cycle specific and primarily target cells in the
S phase. G₀ is the resting phase, G₁ is the pre-DNA synthesis phase, and M is the
mitotic phase.
Question 2
The tumor suppressor gene p53 most commonly induces which cellular process
when DNA damage is detected?
A) Angiogenesis
B) Apoptosis
C) Metastasis
D) Cellular senescence
Rationale: p53 acts as the "guardian of the genome." When DNA damage is
detected, p53 can trigger apoptosis (programmed cell death) to eliminate cells with
irreparable DNA damage, preventing malignant transformation. Loss of p53
function is one of the most common mutations found in human cancers.
,Question 3
Which hereditary syndrome is most strongly associated with a germline mutation
in the BRCA1 gene?
A) Lynch syndrome
B) Li-Fraumeni syndrome
C) Hereditary breast-ovarian cancer syndrome
D) Familial adenomatous polyposis
Rationale: BRCA1 mutations confer high risk for breast and ovarian cancers and
define the hereditary breast-ovarian cancer syndrome. Lynch syndrome is
associated with DNA mismatch-repair genes (MLH1, MSH2, etc.), Li-Fraumeni
with TP53 mutations, and familial adenomatous polyposis with APC mutations.
Question 4
In hereditary non-polyposis colorectal cancer (Lynch syndrome), which DNA
mismatch-repair gene is most frequently mutated?
A) APC
B) MLH1
C) KRAS
D) BRCA1
Rationale: MLH1 (along with MSH2, MSH6, and PMS2) is commonly mutated in
Lynch syndrome, causing microsatellite instability and increased colorectal and
other cancer risks. APC mutations are associated with familial adenomatous
polyposis, KRAS is an oncogene, and BRCA1 is associated with breast/ovarian
cancer.
Question 5
Epigenetic silencing of tumor suppressor genes is most often due to:
A) Point mutations in coding regions
B) DNA hypermethylation of promoter CpG islands
C) Gene amplification
D) Chromosomal translocation
,Rationale: DNA hypermethylation of promoter CpG islands leads to
transcriptional silencing of tumor suppressor genes without altering the DNA
sequence itself. This is an epigenetic change that can be reversed with
demethylating agents such as azacitidine and decitabine.
Question 6
Which hallmark of cancer describes the ability of malignant cells to avoid
programmed cell death?
A) Sustained proliferative signaling
B) Evading apoptosis
C) Inducing angiogenesis
D) Activating invasion and metastasis
Rationale: Evading apoptosis (resisting cell death) is one of the classic hallmarks
of cancer. Cancer cells develop mechanisms to avoid programmed cell death,
including loss of p53 function, overexpression of anti-apoptotic proteins (e.g., Bcl-
2), and activation of survival pathways.
Question 7
According to USPSTF guidelines, which criterion must be met for lung cancer
screening with low-dose CT?
A) Age 50-75 and ≥20 pack-years, quit within 5 years
B) Age 55-80 and ≥30 pack-years smoking history, currently smoking or quit
within 15 years
C) Age 45-70 and any smoking history
D) Age 65-85 and ≥40 pack-years, quit within 20 years
Rationale: USPSTF recommends annual low-dose CT screening for adults aged
55-80 with a ≥30 pack-year smoking history who currently smoke or quit within
the past 15 years. This evidence-based guideline aims to detect lung cancer at an
early, more treatable stage.
, Question 8
Which screening modality is recommended for average-risk adults aged 45-75 for
colorectal cancer detection?
A) Flexible sigmoidoscopy every 5 years
B) Fecal immunochemical test (FIT) annually
C) Colonoscopy every 10 years
D) CT colonography every 3 years
Rationale: Colonoscopy every 10 years is the gold-standard screening test for
average-risk adults aged 45-75, allowing direct visualization and polyp
removal. While other modalities are acceptable, colonoscopy remains the most
comprehensive screening option.
Question 9
Which lifestyle modification is most effective in reducing the risk of lung cancer?
A) Increasing dietary fiber
B) Smoking cessation
C) Regular physical activity
D) Reducing alcohol consumption
Rationale: Smoking cessation is the single most effective lifestyle modification
for reducing lung cancer risk. Tobacco smoking is responsible for approximately
85% of all lung cancer cases. While diet, exercise, and alcohol reduction are
important for overall health, smoking cessation has the greatest impact on lung
cancer prevention.
Question 10
A 62-year-old heavy smoker is being evaluated for lung cancer screening.
According to USPSTF guidelines, what is the most appropriate recommendation?
A) Annual low-dose CT screening
B) Chest X-ray annually
C) Sputum cytology screening
D) No screening is recommended
