Radiation Protection and Radiobiology Test UPDATED ACTUAL Exam Questions and CORRECT Answers

Radiation Protection and Radiobiology Test
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What is any chemical reaction in which atoms lose electrons called?
a. Oxidation
b. Osmosis
c. Synthesis

d. Metabolism - CORRECT ANSWER✔✔- Oxidation


The cell components that contain the centrioles are the
a. Centrosomes
b. Lysosomes
c. Ribosomes

d. Golgi apparatus and mitochondria - CORRECT ANSWER✔✔- Centrosomes


During which of the following subphases of mitosis do the centrioles migrate to opposite
sides of the cell and begin to regulate the formation of the mitotic spindle?
a. Telophase
b. Prophase
c. Anaphase

d. Metaphase - CORRECT ANSWER✔✔- Prophase


Fraternal twins may also be referred to as
a. Dizygotic twins
b. Trizygotic twins
c. Polyzygotic twins

d. Monozygotic twins - CORRECT ANSWER✔✔- Dizygotic twins


Antibodies are protein molecules produced by specialized cells in the bone marrow called

,a. B lymphocytes
b. R lymphocytes
c. Megakaryocytes

d. Oocytes - CORRECT ANSWER✔✔- B lymphocytes


This part of the cell transfers food and molecules from one part of the cell to another.
a. Mitochondria
b. Golgi apparatus
c. Ribosomes

d. Endoplasmic reticulum (ER) - CORRECT ANSWER✔✔- Endoplasmic reticulum (ER)


In general, which of the following can human cells do?
1. Move, grow, react, and protect themselves
2. Repair damage and regulate life processes
3. Reproduce


a. 2 and 3 only
b. 1, 2, and 3
c. 1 and 3 only

d. 1 and 2 only - CORRECT ANSWER✔✔- 1, 2, and 3


The steps, or rungs, of the DNA ladder-like structure consist of complementary chemicals
that are
a. Acitic acids
b. Fatty acids
c. Pairs of nitrogenous bases

d. Sugar-phosphate compounds - CORRECT ANSWER✔✔- Pairs of nitrogenous bases


How many different amino acids are involved in protein synthesis in humans?
a. 39

,b. 15
c. 7

d. 22 - CORRECT ANSWER✔✔- 22


The total amount of genetic material (DNA) contained within the chromosomes of a human
being is called
a. Human genome
b. Human composition
c. Human organelles

d. Human mitosis - CORRECT ANSWER✔✔- Human genome


Which of the following are compounds called purines?
1. Adenine and cytosine
2. Adenine and guanine
3. Adenine and thymine


a. 3 only
b. 2 only
c. 1, 2, and 3

d. 1 only - CORRECT ANSWER✔✔- 2 only


Inorganic materials are compounds that
a. Do not contain carbon
b. Contain moderate amounts of carbon
c. Contain only very small amounts of carbon

d. Contain large amounts of carbon - CORRECT ANSWER✔✔- Do not contain carbon


Which of the following serves as a prototype for messenger RNA (mRNA)?
a. Nitric acid (HNO3)
b. Potassium (K) and sodium (Na)

, c. Transfer RNA (tRNA)

d. Deoxyribonucleic acid (DNA) - CORRECT ANSWER✔✔- Deoxyribonucleic acid (DNA)


The most radiosensitive blood cells.
a. Granulocytes
b. Erythrocytes
c. Lymphocytes

d. Thrombocytes - CORRECT ANSWER✔✔- Lymphocytes


True or false:
Mapping of chromosomes is called karyotyping and is done during prophase - CORRECT
ANSWER✔✔- False


Which of the following are major tasks of the cytoplasm?
1. Accepts and builds up unrefined materials and assembles from these materials new
substances such as carbohydrates, lipids, and proteins.
2. Breaks down organic materials to produce energy.
3. Packages substances for distribution to other areas of the cell or to various sites in the body
through the circulation.
4. Eliminates waste products.


a. 1, 2, and 3 only
b. 1, 2, 3, and 4
c. 1, 3, and 4 only

d. 2, 3, and 4 only - CORRECT ANSWER✔✔- 1, 2, 3, and 4


During mitosis, which phase of the cellular life cycle is the actual DNA synthesis period?
a. M
b. S
c. G2

d. G1 - CORRECT ANSWER✔✔- S