Page 1 of 74
CANCER COMPREHENSIVE EXAM LATEST VERSION
QUESTIONS AND ANSWERS 2026 EDITION
Cancer Exam: 250 Practice Questions with Rationales
DOMAIN 1: CANCER BIOLOGY, CELL CYCLE, AND CARCINOGENESIS (50 Questions)
1. What characteristic best defines a cell as cancerous?
A) It demonstrates uncontrolled growth
B) It alters all cell metabolism
C) It results in fatigue and weight loss
D) It produces special hormones
Answer: A) It demonstrates uncontrolled growth
Rationale: Cancer cells are fundamentally defined by their uncontrolled growth. They
have lost normal regulatory mechanisms that control cell division, allowing them to
proliferate without restraint .
2. During which phase of the cell cycle does the cell grow and prepare the internal
organelles for replication?
A) Interphase
B) Prophase
C) Metaphase
D) Anaphase
Answer: A) Interphase
Rationale: During interphase, the cell prepares by duplicating the organelles and
growing in size in preparation for division. Prophase, metaphase, and anaphase are all
stages of mitosis .
, Page 2 of 74
3. Which cell cycle phase is associated with a terminally differentiated cell such as
a cardiac myocyte or a neuron?
A) G0
B) G1
C) S phase
D) G2
Answer: A) G0
Rationale: Cells that are no longer able to enter the cell cycle and divide are in a state of
permanent G0. Terminally differentiated cells, such as cardiac myocytes and neurons,
are unable to enter the S phase and divide .
4. Which protein's synthesis is promoted when cells are damaged and the levels of
p53 increase?
A) Cyclin A
B) Cyclin D
C) Cyclin-dependent kinase 1
D) p21
Answer: D) p21
Rationale: Increased levels of p53 upregulate the protein p21, an inhibitory protein that
disrupts several cyclin/CDK combinations and can halt the cell cycle. This allows time
for DNA repair before replication .
5. What type of cancer affects the lymph nodes, spleen, and bone marrow?
A) Sarcoma
B) Carcinoma
C) Leukemia
D) Lymphoma
Answer: D) Lymphoma
Rationale: Lymphoma is a cancer that affects the lymphatic system, including the
lymph nodes, spleen, and bone marrow. Leukemia affects blood-forming tissues but is
characterized by abnormal white blood cells circulating in the blood .
6. Which of the following terms for abnormal accumulations of cells is synonymous
with cancer?
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A) Growth
B) Malignancy
C) Neoplasm
D) Tumor
Answer: B) Malignancy
Rationale: A malignancy is a cancerous accumulation of cells. A neoplasm is an
accumulation of cells that can be either benign or malignant. A tumor is a general term
for an abnormal mass of tissue .
7. The correct sequence of stages in malignant neoplasm development is:
A) Promotion, initiation, dissemination, progression
B) Progression, promotion, initiation, dissemination
C) Initiation, promotion, progression, dissemination
D) Initiation, dissemination, promotion, progression
Answer: C) Initiation, promotion, progression, dissemination
Rationale: The correct order is: Initiation (irreversible DNA damage), Promotion (cells
proliferate in response to promoters), Progression (tumor cells acquire malignant
characteristics), and Dissemination (metastasis to distant sites) .
8. True carcinogens determine the stage of:
A) Promotion
B) Initiation
C) Progression
D) Angiogenesis
Answer: B) Initiation
Rationale: True carcinogens (initiators) cause the initiation stage by inducing
irreversible, non-lethal, inherited disturbances to the cellular genome. Promoters act on
initiated cells during the promotion stage. Carcinogens initiate the carcinogenic
process .
9. Cancer-causing mutations of proto-oncogenes lead to oncogenes in this type of
mutation:
A) Gain of function
B) Loss of function
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C) Frameshift mutation
D) Point mutation
Answer: A) Gain of function
Rationale: A mutation that converts a latent proto-oncogene to an active oncogene
promotes cancer by a gain-of-function mechanism. This is a dominant mutation. In
contrast, tumor suppressor genes undergo loss-of-function mutations .
10. What do carcinogens have in common?
A) Physical and chemical structure
B) Lethal and irreversible disturbance of the genome
C) Their mitogenic effect
D) Irreversible, non-lethal, and inherited disturbance of the cellular genome
Answer: D) Irreversible, non-lethal, and inherited disturbance of the cellular
genome
Rationale: Carcinogens cause irreversible, non-lethal, and inherited (to daughter cells)
disturbances of the cellular genome. This genetic change is the hallmark of initiation,
allowing transformed cells to pass mutations to subsequent generations .
11. Initiation leads to:
A) Activation of oncogenes
B) Inhibition of oncogenes
C) Changes in the activity of apoptotic genes
D) All of the above
Answer: A) Activation of oncogenes
Rationale: Initiation results in the activation of oncogenes. This is the first step in the
multistage process of carcinogenesis, where normal proto-oncogenes are converted
into active oncogenes .
12. Which of the following is NOT a method of cell death?
A) Apoptosis
B) Necrosis
C) Senescence
D) Angiogenesis
CANCER COMPREHENSIVE EXAM LATEST VERSION
QUESTIONS AND ANSWERS 2026 EDITION
Cancer Exam: 250 Practice Questions with Rationales
DOMAIN 1: CANCER BIOLOGY, CELL CYCLE, AND CARCINOGENESIS (50 Questions)
1. What characteristic best defines a cell as cancerous?
A) It demonstrates uncontrolled growth
B) It alters all cell metabolism
C) It results in fatigue and weight loss
D) It produces special hormones
Answer: A) It demonstrates uncontrolled growth
Rationale: Cancer cells are fundamentally defined by their uncontrolled growth. They
have lost normal regulatory mechanisms that control cell division, allowing them to
proliferate without restraint .
2. During which phase of the cell cycle does the cell grow and prepare the internal
organelles for replication?
A) Interphase
B) Prophase
C) Metaphase
D) Anaphase
Answer: A) Interphase
Rationale: During interphase, the cell prepares by duplicating the organelles and
growing in size in preparation for division. Prophase, metaphase, and anaphase are all
stages of mitosis .
, Page 2 of 74
3. Which cell cycle phase is associated with a terminally differentiated cell such as
a cardiac myocyte or a neuron?
A) G0
B) G1
C) S phase
D) G2
Answer: A) G0
Rationale: Cells that are no longer able to enter the cell cycle and divide are in a state of
permanent G0. Terminally differentiated cells, such as cardiac myocytes and neurons,
are unable to enter the S phase and divide .
4. Which protein's synthesis is promoted when cells are damaged and the levels of
p53 increase?
A) Cyclin A
B) Cyclin D
C) Cyclin-dependent kinase 1
D) p21
Answer: D) p21
Rationale: Increased levels of p53 upregulate the protein p21, an inhibitory protein that
disrupts several cyclin/CDK combinations and can halt the cell cycle. This allows time
for DNA repair before replication .
5. What type of cancer affects the lymph nodes, spleen, and bone marrow?
A) Sarcoma
B) Carcinoma
C) Leukemia
D) Lymphoma
Answer: D) Lymphoma
Rationale: Lymphoma is a cancer that affects the lymphatic system, including the
lymph nodes, spleen, and bone marrow. Leukemia affects blood-forming tissues but is
characterized by abnormal white blood cells circulating in the blood .
6. Which of the following terms for abnormal accumulations of cells is synonymous
with cancer?
, Page 3 of 74
A) Growth
B) Malignancy
C) Neoplasm
D) Tumor
Answer: B) Malignancy
Rationale: A malignancy is a cancerous accumulation of cells. A neoplasm is an
accumulation of cells that can be either benign or malignant. A tumor is a general term
for an abnormal mass of tissue .
7. The correct sequence of stages in malignant neoplasm development is:
A) Promotion, initiation, dissemination, progression
B) Progression, promotion, initiation, dissemination
C) Initiation, promotion, progression, dissemination
D) Initiation, dissemination, promotion, progression
Answer: C) Initiation, promotion, progression, dissemination
Rationale: The correct order is: Initiation (irreversible DNA damage), Promotion (cells
proliferate in response to promoters), Progression (tumor cells acquire malignant
characteristics), and Dissemination (metastasis to distant sites) .
8. True carcinogens determine the stage of:
A) Promotion
B) Initiation
C) Progression
D) Angiogenesis
Answer: B) Initiation
Rationale: True carcinogens (initiators) cause the initiation stage by inducing
irreversible, non-lethal, inherited disturbances to the cellular genome. Promoters act on
initiated cells during the promotion stage. Carcinogens initiate the carcinogenic
process .
9. Cancer-causing mutations of proto-oncogenes lead to oncogenes in this type of
mutation:
A) Gain of function
B) Loss of function
, Page 4 of 74
C) Frameshift mutation
D) Point mutation
Answer: A) Gain of function
Rationale: A mutation that converts a latent proto-oncogene to an active oncogene
promotes cancer by a gain-of-function mechanism. This is a dominant mutation. In
contrast, tumor suppressor genes undergo loss-of-function mutations .
10. What do carcinogens have in common?
A) Physical and chemical structure
B) Lethal and irreversible disturbance of the genome
C) Their mitogenic effect
D) Irreversible, non-lethal, and inherited disturbance of the cellular genome
Answer: D) Irreversible, non-lethal, and inherited disturbance of the cellular
genome
Rationale: Carcinogens cause irreversible, non-lethal, and inherited (to daughter cells)
disturbances of the cellular genome. This genetic change is the hallmark of initiation,
allowing transformed cells to pass mutations to subsequent generations .
11. Initiation leads to:
A) Activation of oncogenes
B) Inhibition of oncogenes
C) Changes in the activity of apoptotic genes
D) All of the above
Answer: A) Activation of oncogenes
Rationale: Initiation results in the activation of oncogenes. This is the first step in the
multistage process of carcinogenesis, where normal proto-oncogenes are converted
into active oncogenes .
12. Which of the following is NOT a method of cell death?
A) Apoptosis
B) Necrosis
C) Senescence
D) Angiogenesis
