Chapter 33 Molecular Radiobiology-Bushong Test Bank

Chapter 33. Molecular Radiobiology Bushong: Radiologic Science for Technologists




MULTIPLE CHOICE


1. If a macromolecule has (a) , it will break down into smaller molecules. a. main-chain
scission
b. point lesion
c. cross-linking
d. point mutation




ANS: A
A main-chain scission of a macromolecule results in a breakdown into smaller molecules.


2. In vitro irradiation of macromolecules causes damage to macromolecules. a.
repairable
b. reversible
c. irreversible
d. repairable and reversible




ANS: D
In vitro irradiation to macromolecules causes repairable and reversible
damage to macromolecules.
3. The most radiosensitive macromolecule is .
a. protein
b. DNA
c. mRNA

, d. tRNA




ANS: B
The most radiosensitive macromolecule is DNA.


4. DNA is contained in the of the cell nucleus.
a. proteins
b. cytoplasm
c. chromosomes
d. RNA




ANS: C
DNA is contained in the chromosomes of the cell nucleus.


5. A type of DNA damage that may not be reversible is a .
a. cross-linking
b. base change or loss
c. rung breakage
d. severed side rail




ANS: B
A type of DNA damage that may not be reversible is base change or loss.


6. Radiation damage to DNA can result in .
a. cell death

, b. malignant disease
c. genetic changes
d. any of the options




ANS: D
Radiation damage to DNA can result in malignant disease, genetic changes, or cell
death.


7. Molecular lesions of DNA are called .
a. point mutations
b. broken side rails
c. cross-linking
d. rung breaks




ANS: A
Molecular lesions of DNA are called point mutations.


8. The principal radiation interaction within the human body is with .
a. DNA
b. macromolecules
c. water
d. RNA




ANS: C
The principal radiation interaction within the human body is with water.