Questions And Answers 2025
Cytosine bonds only with which of the following nitrogenous organic bases? - Answer - guanine
This target volume accounts for internal organ movement, such as breathing. - Answer - ITV -
Internal Target Volume
RNA varies from DNA in composition as it has ________ instead of thymine. - Answer - uracil
What is the dose-tissue response, at conventional fractionation, for Lhermitte's Sign? - Answer -
2000 to 3000 cGy
This is the treatment port for what cancer? - Answer - Whole brain
What is the dose-tissue response, at conventional fractionation, for laryngitis? - Answer - 5000
cGy
What is the dose-tissue response, at conventional fractionation, for erythema? - Answer - 20 Gy
To reduce the severity of any head and neck complication, the patient should be encouraged to
avoid all the following except: - Answer - Room temperature and smooth foods and drinks
What is the dose-tissue response, at conventional fractionation, for dry mouth? - Answer - 10 to
20 Gy
, Multiple tumor types are included in the head and neck region. Which type of primary tumor is
most common? - Answer - Squamous cell carcinoma
Identify the lymph node chain, with reference to breast cancer Tx, numbered 1. - Answer -
Internal mammary
Which of the following are functions of the cell membrane?
1.protecting the contents of the cell form its environment
2.controlling the passage of water and other materials into the cell
3.allowing all substances to pass - Answer - 1 and 2
"Interphase" consists of which of the following? - Answer - G1, S, and G2
The "side rails" of the DNA molecule are composed of: - Answer - sugars and phosphates
What is the end point when the TD 5/5 for the optic nerve is exceeded? - Answer - Blindness
What healthy tissue is at most risk of radiation damage with treatment to the maxillary antrum?
- Answer - Eye
The most common sign or symptom of oral cancer is: - Answer - Ulceration
For patients with carious teeth, when is dental work recommended when anticipating oral
cavity irradiation? - Answer - Before treatment
Which is the most common type of cancer in the brain? - Answer - Metastasis