Free Biological and Medical Uses of Radiation MCQs with Answers
50 Biological and Medical Uses of Radiation MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Radiation in medicine includes X-rays and gamma rays for imaging, radioactive tracers for diagnosis, and controlled radiation for destroying cancerous tissue. The topic also covers CT scans, PET imaging, radiotherapy, sterilisation, half-life and dosage, alongside biological damage, shielding and the need to balance diagnostic or therapeutic benefit against exposure.
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50 questions · page 2 of 3
- A. Detect bone fractures
- B. Detect heart diseases
- C. Treat cancer by controIIed exposure
- D. Detect fault in radio receiving circuits
Explanation: In radiotherapy X-rays are used to kill cancer cells. X-rays are a form of high-energy radiation that can damage DNA, the genetic material…
Correct answer: Treat cancer by controIIed exposure- A. Cancer
- B. Lungs
- C. Skin cancer
- D. Thyroid gland
Explanation: Radioactive iodine is absorbed by the thyroid glands. The amount of radioactive iodine absorbed can be measured by a special type of scan…
Correct answer: Thyroid gland- A. lndustries
- B. Electrical machinery
- C. Agriculture
- D. All of these
Explanation: Radioactive phosphorus is used as a tracer to track the movement of phosphorus through the soil into the plants.
Correct answer: Agriculture- A. Cancer
- B. Kidneys
- C. Lungs
- D. Thyroid
Explanation: Explanation is given below: Cobalt-60 (Co-60) is a radioactive isotope of cobalt that has been used in various medical applications…
Correct answer: Cancer- A. Agriculture industry
- B. Medical industry
- C. Support Industry
- D. All of above
Explanation: The explanation is given below: Gamma rays (γ-rays) are the type of electromagnetic radiation commonly used in various medical imaging…
Correct answer: Medical industry- A. 1mSv
- B. 1mGy
- C. 1Gy
- D. 1Sv
Explanation: 1 Sv (sievert) is huge - it represents 1000 mSv. A sudden dose of 1 Sv can cause radiation sickness.Background radiation that an average…
Correct answer: 1mSv- A. 0.01 Gy / RBE
- B. 0.01 Sv × RBE
- C. 0.01 RBE
- D. 0.01 Cy
Explanation: One rem is equal to 0.01 sievert (Sv) multiplied by the Relative Biological Effectiveness (RBE) factor.
Correct answer: 0.01 Sv × RBE- A. Zener effect
- B. Biological effect
- C. Somatic effect
- D. Genetic effect
Explanation: These effects such as skin burn, loss of hair, drop in white blood cells, and induction of cancer are examples of the somatic effects of…
Correct answer: Somatic effect- A. Chlorine-36
- B. Cobalt-60
- C. Iodine-131
- D. Radium-226
Explanation: Iodine-131 is used in the diagnosis and treatment of thyroid disorders, particularly hyperthyroidism and thyroid cancer.
Correct answer: Iodine-131- A. sterilisation of food.
- B. validation of expiry date.
- C. improving cooking process.
- D. increasing the shelf life of food.
Explanation: A) sterilisation of food: This is correct. X-rays are a type of ionizing radiation used in food irradiation to kill pathogens and…
Correct answer: sterilisation of food.- A. cancer.
- B. kidney stones.
- C. spinal dislocation.
- D. nervous breakdown.
Explanation: Nuclear radiation therapy, also known as radiation therapy or radiotherapy, is a treatment that uses high doses of radiation to kill…
Correct answer: cancer.- A. Cobalt-60.
- B. Iodine-131.
- C. Carbon-14.
- D. Strontium-90.
Explanation: The correct answer is Iodine-131. This isotope is highly effective in the treatment of thyroid-related conditions because the thyroid…
Correct answer: Iodine-131.- A. Alpha particles
- B. UV rays
- C. Gamma rays
- D. X rays
Explanation: Diagnostic techniques in nuclear medicine use radioactive tracers which emit gamma rays from within the body.
Correct answer: Gamma rays34. 1 Gy is equal to
- A. 1 Jkg
- B. 1 JKg-1
- C. 1J-1Kg
- D. J-1 Kg-1
Explanation: One Gy is the international system of units (SI) equivalent to 100 rads, which is equal to an absorbed dose of 1 Joule/kilogram.
Correct answer: 1 JKg-1- A. Sugar
- B. Blood pressure
- C. Cholesterol
- D. All of these options are correct
Explanation: All of these options are correct. X-rays cannot detect sugar, blood pressure, or cholesterol.
Correct answer: All of these options are correct- A. Transmitted through bones
- B. Reflected by bones
- C. Absorbed by bones
- D. Scattered by bones
Explanation: Dense bone absorbs much of the radiation while soft tissue (muscle, fat, and organs) allow more of the x-rays to pass through them.
Correct answer: Absorbed by bones- A. Bones
- B. Skin
- C. Liver
- D. Thyroid gland
Explanation: Cobalt is absorbed by the small intestine to the blood and later absorbed by the liver, as it is a core element of vitamin B12…
Correct answer: Liver- A. Blurry Area
- B. Bright Area
- C. Dark Area
- D. Red Area
Explanation: Explanation:A crack allows greater amount of X-rays to pass, which appears on photographic film as dark area.
Correct answer: Dark Area- A. Severe Crop Damage
- B. Decay of Microorganisms
- C. Sunburn, Blindness, Skin Cancer
- D. All of the above
Explanation: Explanation:Ultraviolet radiation can cause severe crop damage, decay of microorganisms, sunburn, blindness, and skin cancer.
Correct answer: All of the above- A. Radon
- B. Xenon
- C. Krypton
- D. Argon
Explanation: A is correct as radan has radioactive tendencies and is used as radiation therapy for cancer patients.The alpha particles emitted by the…
Correct answer: Radon