Podcast
Questions and Answers
What is the primary target of radiation in the biological system?
What is the primary target of radiation in the biological system?
- Cell membrane
- Ribosomes
- DNA molecule (correct)
- Mitochondria
What is the primary mechanism by which radiation causes biological effects?
What is the primary mechanism by which radiation causes biological effects?
- Both direct and indirect effects (correct)
- Neither direct nor indirect effects
- Direct effect
- Indirect effect
What is the role of free radicals in the biological effects of radiation?
What is the role of free radicals in the biological effects of radiation?
- Free radicals have no effect on biological systems
- Free radicals are energetic molecules that can transfer their excess energy to DNA, causing bond breaks (correct)
- Free radicals are stable molecules that do not interact with DNA
- Free radicals act as antioxidants to protect against radiation damage
How is hydrogen peroxide formed during the radiolysis of water?
How is hydrogen peroxide formed during the radiolysis of water?
What is the role of hydroperoxyl radicals in the radiolysis of water?
What is the role of hydroperoxyl radicals in the radiolysis of water?
Which of the following is a biologic factor that affects radiosensitivity?
Which of the following is a biologic factor that affects radiosensitivity?
Which of the following statements is correct about the effect of radiation on chromosomes?
Which of the following statements is correct about the effect of radiation on chromosomes?
What are isochromatids in the context of radiation-induced chromosome aberrations?
What are isochromatids in the context of radiation-induced chromosome aberrations?
Which of the following statements is correct about the effect of radiation on DNA?
Which of the following statements is correct about the effect of radiation on DNA?
What does a 'single-hit' refer to in the context of radiation-induced chromosome aberrations?
What does a 'single-hit' refer to in the context of radiation-induced chromosome aberrations?
Which of the following statements is incorrect about the effect of radiation on skin cells?
Which of the following statements is incorrect about the effect of radiation on skin cells?
Which of the following cells are described as the most radiosensitive in the body?
Which of the following cells are described as the most radiosensitive in the body?
What is the primary target of radiation in a cell?
What is the primary target of radiation in a cell?
Which type of DNA damage is considered lethal for a cell?
Which type of DNA damage is considered lethal for a cell?
What is the primary mechanism by which cells die after irradiation?
What is the primary mechanism by which cells die after irradiation?
What is the consequence of a base damage in DNA?
What is the consequence of a base damage in DNA?
Which of the following is a direct effect of radiation on water molecules?
Which of the following is a direct effect of radiation on water molecules?
What is the primary mechanism by which radiation causes damage to DNA?
What is the primary mechanism by which radiation causes damage to DNA?
What is the primary consequence of a double-strand break in DNA?
What is the primary consequence of a double-strand break in DNA?
Which of the following is NOT a type of radiation damage described in the text?
Which of the following is NOT a type of radiation damage described in the text?
What is the primary function of DNA in a cell?
What is the primary function of DNA in a cell?
Which of the following statements about single-strand breaks in DNA is correct?
Which of the following statements about single-strand breaks in DNA is correct?
