Which of the following are true about radiosensitivity?  Select all that apply.Group of answer choicesIt is proportional to the rate of cell divisionIt varies with the cell cycleIt has no dependence on total doseIt varies with a person’s ageIt depends on the linear energy transfer of the radiationIt is similar for all cells in the body

Which of these quantities impacts on the equivalent dose? Select all that apply. Marks will be deducted for any incorrect responses.Group of answer choicesAbility of the tissue to absorb the radiationThe degree to which the particular type of radiation can cause biological damageEnergy flux of the incident radiationTime over which the radiation is applied

(d) Which of the following factors determine the impact of exposure to radioactivity? A. Distance from source B. Duration of exposure C. Type of radiation D. All of the above

Which of the following statements is true?Group of answer choicesFor any particular radionuclide, whatever the size of the sample, the activity always remains the constant.For any particular radionuclide, whatever the size of the sample, the same percentage of its atoms are always transformed in the same interval of time. Activity will decrease with time as more atoms decay.For any particular radionuclide the percentage of its atoms transformed in an interval of time depends on the size of the sample. A larger sample has a larger activity.For any particular radionuclide, whatever the size of the sample, the same number of its atoms are always transformed in the same interval of time. Activity will decrease

Choose TRUE if the statement is correct, FALSE if otherwise. Ionization, is the process if a wave has enough energy, that it can remove the inner electrons from atoms. Radiation dose is measured in sieverts (Sv) or millisieverts (mSv). Ionizing waves have a severe effect on living tissue by killing cells or damaging DNA. Ultraviolet (UV) rays, X-rays, and Gamma rays are examples of non-ionizing waves. Radiographers take several X-rays each day and their potential dose is much lower. Some exposure to UV radiation is beneficial like skin uses UV radiation from the Sun to make vitamin D but overexposure is generally harmful. Sun Protection Factor (SPF) is a number used by sunscreen manufacturers to indicate how much longer youcan stay out in the sun before getting burnt.  Microwaves are radio waves with long wavelengths that causes very slightly absorbed by the body and can cause a minor heating effect.

Choose the incorrect statement(s)(a) Crop yields and quality will be adversely affected by more UV radiation.(b) Some inanimate materials such as paint, buildings, roads are more susceptible todeterioration when they are exposed to increased levels of UV radiation.(c) UV radiation has no negative impact on human immune system(d) Exposure to UV radiation will increase more cases of skin cancer.(a) and (b)(a) and (c)(b) and (d)(b) and (c)