Radiation Biology Exam 1 Prep
2024/2025 Exam Questions and Detailed
Answers | Get it 100% Correct Answers
Dividing the radiation doses into split fractions has less effect on cell
survival for neutrons (high LET) compared to photon radiation
True or False - 🧠ANSWER ✔✔True
What is the recommended time required between radiation doses in order
to allow for reassortment of the cell population to enter a new radiosensitive
cell phase?
4 hours
24 hours
6 hours
2 hours - 🧠ANSWER ✔✔6 hours
Which stage of mitosis is most variable amongst mammalian cells?
G1
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,G2
S
Z - 🧠ANSWER ✔✔G1
Which cell cycle stage is OER highest in?
G1
S
G2
Z - 🧠ANSWER ✔✔S
What is the prominent HDR source used today?
Iridium-192
Cesium-137
Iodine-125
Iodine-131 - 🧠ANSWER ✔✔Iridium-192
A decrease in dose rate has decreased cell survival
True or False - 🧠ANSWER ✔✔False
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, An increase in dose rate for Iridium-192 HDR applications improves local
recurrence rates
True or False - 🧠ANSWER ✔✔True
Fractionated doses allow for better repair for multiple-track damage
True or False - 🧠ANSWER ✔✔True
Which phase of the cell cycle is most resistant?
G1
S
G2
M - 🧠ANSWER ✔✔S
Which phase of the cell cycle is associated with the molecular checkpoint
gene? - 🧠ANSWER ✔✔G2
Which of the following categories of mammalian cells is the most
radioresistant?
Differentiating Intermitotic Cells
Vegetative Intermitotic Cells
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2024/2025 Exam Questions and Detailed
Answers | Get it 100% Correct Answers
Dividing the radiation doses into split fractions has less effect on cell
survival for neutrons (high LET) compared to photon radiation
True or False - 🧠ANSWER ✔✔True
What is the recommended time required between radiation doses in order
to allow for reassortment of the cell population to enter a new radiosensitive
cell phase?
4 hours
24 hours
6 hours
2 hours - 🧠ANSWER ✔✔6 hours
Which stage of mitosis is most variable amongst mammalian cells?
G1
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,G2
S
Z - 🧠ANSWER ✔✔G1
Which cell cycle stage is OER highest in?
G1
S
G2
Z - 🧠ANSWER ✔✔S
What is the prominent HDR source used today?
Iridium-192
Cesium-137
Iodine-125
Iodine-131 - 🧠ANSWER ✔✔Iridium-192
A decrease in dose rate has decreased cell survival
True or False - 🧠ANSWER ✔✔False
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, An increase in dose rate for Iridium-192 HDR applications improves local
recurrence rates
True or False - 🧠ANSWER ✔✔True
Fractionated doses allow for better repair for multiple-track damage
True or False - 🧠ANSWER ✔✔True
Which phase of the cell cycle is most resistant?
G1
S
G2
M - 🧠ANSWER ✔✔S
Which phase of the cell cycle is associated with the molecular checkpoint
gene? - 🧠ANSWER ✔✔G2
Which of the following categories of mammalian cells is the most
radioresistant?
Differentiating Intermitotic Cells
Vegetative Intermitotic Cells
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