RDBG LO1: LS 3&4 Review

Absorption of radiation causes more damage to an organic molecule in the absence of oxygen

• True

• False

Answer explanation

In the presence of oxygen, the original molecule may not reform. Instead, the components may react with oxygen to form an organic molecule radical and a hydroperoxyl radical.

When ___ cells are irradiated, the damage appears in the irradiated individual.

• Somatic

• Reproductive

• Germ

• Epithelial

_____ action is more likely to occur after exposure to high-LET radiation.

• Direct

• Indirect

• Multidirectional

• No

Answer explanation

Low-LET= few interactions. More likely to irradiate a water molecule since we are 80% water.

High-LET= more ionizing events in a small distance. More likely to interact with DNA directly.

Alpha particles are an example of ___ radiation.

• High-LET

• Low-LET

• Non-ionizing

• Electromagnetic

What is an example of Low-LET radiation?

____ radiation causes few ionizations over a long distance.

• Low-LET

• High-LET

What are the primary 2 substances that produce biologic damage directly after  radiation interacts with water?

• Hydrogen radical

• Bleach

• Hydrogen peroxide

• Hydroperoxyl radical

Absorption of radiation causes more damage to an organic molecule in the absence of oxygen

• True

• False

Answer explanation

In the presence of oxygen, the original molecule may not reform. Instead, the components may react with oxygen to form an organic molecule radical and a hydroperoxyl radical.