Radiation Biology Chapter 7 Questions
and Answers Already Passed
Which type of radiation is most likely to cause direct DNA damage?
✔✔A. High-LET radiation
B. Low-LET radiation
C. Non-ionizing radiation
D. Background radiation
What happens when radiation creates free radicals in a cell?
A. The cell becomes more resistant to radiation
✔✔B. The radicals can damage DNA and other cellular structures
C. The cell undergoes immediate apoptosis
D. The cell becomes stronger and more efficient
Which factor increases a cell’s radiosensitivity?
✔✔A. High mitotic activity
B. Increased cell maturity
C. Low oxygen levels
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,D. Slow division rate
What is the primary function of repair enzymes in radiation-damaged cells?
A. To increase radiation absorption
✔✔B. To correct DNA damage
C. To enhance cell division
D. To create new mutations
Which type of cells are most sensitive to radiation?
A. Muscle cells
B. Nerve cells
✔✔C. Stem cells
D. Fat cells
Which of the following best describes apoptosis?
✔✔A. Programmed cell death
B. Uncontrolled cell division
C. Permanent DNA repair
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, D. Increased energy production
Which term describes the process where damaged cells incorrectly repair DNA, leading to
mutations?
A. Apoptosis
B. Cell cycle arrest
✔✔C. Misrepair
D. Radiation hardening
What is the most dangerous outcome of misrepaired DNA damage?
A. Increased energy production
B. Enhanced immune response
✔✔C. Uncontrolled cell growth leading to cancer
D. Strengthened cell walls
Which phase of the cell cycle is most resistant to radiation?
A. G1 phase
B. M phase
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and Answers Already Passed
Which type of radiation is most likely to cause direct DNA damage?
✔✔A. High-LET radiation
B. Low-LET radiation
C. Non-ionizing radiation
D. Background radiation
What happens when radiation creates free radicals in a cell?
A. The cell becomes more resistant to radiation
✔✔B. The radicals can damage DNA and other cellular structures
C. The cell undergoes immediate apoptosis
D. The cell becomes stronger and more efficient
Which factor increases a cell’s radiosensitivity?
✔✔A. High mitotic activity
B. Increased cell maturity
C. Low oxygen levels
1
,D. Slow division rate
What is the primary function of repair enzymes in radiation-damaged cells?
A. To increase radiation absorption
✔✔B. To correct DNA damage
C. To enhance cell division
D. To create new mutations
Which type of cells are most sensitive to radiation?
A. Muscle cells
B. Nerve cells
✔✔C. Stem cells
D. Fat cells
Which of the following best describes apoptosis?
✔✔A. Programmed cell death
B. Uncontrolled cell division
C. Permanent DNA repair
2
, D. Increased energy production
Which term describes the process where damaged cells incorrectly repair DNA, leading to
mutations?
A. Apoptosis
B. Cell cycle arrest
✔✔C. Misrepair
D. Radiation hardening
What is the most dangerous outcome of misrepaired DNA damage?
A. Increased energy production
B. Enhanced immune response
✔✔C. Uncontrolled cell growth leading to cancer
D. Strengthened cell walls
Which phase of the cell cycle is most resistant to radiation?
A. G1 phase
B. M phase
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