Cell and Molecular Biology
Practice Test
Test I: Multiple Choice: Encircle the letter of the correct answer.
1. Who proposed a model of DNA known as the double helical ladder with sugar phosphate sides?
a. Franklin and Crick c. Watson and
Miescher
b. Franklin and Wilkins d. Watson and Crick
2. Which of the following is described as a self- replicating material that is present in every living
organism?
a. chromosomes c. genes
b. DNA d. ATP
3. Which of the following is the process by which a double-stranded DNA molecule is copied to produce
two identical DNA molecules?
a. DNA growth c. DNA synthesis
b. DNA repair d. DNA replication
4. Which of the following refers to the movement of molecules across a cell membrane from a region of
lower concentration to a region of higher concentration?
a. active transport c. transporters
b. passive transport d. channels
5. Which of the following member transport proteins
discriminate mainly on the basis of size and
electric charge?
a. channels c. phosphate
b. lactose permease d. transporter
6. Which of the following is the transport of substances across a biological membrane from an area of
higher concentration to an area of lower concentration with the help of a transport molecule?
a. osmosis c. facilitated diffusion
b. pumps d. simple diffusion
7. Which of the following is a form of passive transport that involves a solvent moving through a
selectively permeable or semipermeable membrane from an area of higher concentration to an area of
lower concentration?
a. osmosis c. Facilitated diffusion
b. pumps d. Simple diffusion
8. Which of the following membrane-enclosed organelles generates most of the chemical energy needed
to power the cell's biochemical reactions?
a. golgi body c. mitochondria
b. endoplasmic reticulum d. peroxisomes
9. Which of the following membrane-enclosed organelles contains enzymes used in a variety of oxidative
reactions that break down lipids and destroy toxic molecules?
a. golgi body c. mitochondria
b. endoplasmic reticulum d. peroxisomes
10. Which of the following encompasses a series of reactions in which the substrate is continuously
reformed, and the intermediate metabolites are continuously regenerated?
a. anabolic pathway c. metabolic pathway
b. catabolic pathway d. metabolic regulation
11. Which of the following refers to the set of chemical reactions that occur in a cell enabling it to keep
living, growing and dividing?
a. anabolism c. metabolism
b. catabolism d. glycolysis
12. Which of the following metabolic reactions involve the breaking down of complex molecules into
simpler ones with a release of energy?
a. anabolism c. metabolism
b. catabolism d. fermentation
13. Which of the following is metabolic reactions require energy to build complex molecules?
a. anabolism c. metabolism
b. catabolism d. fermentation
14. Which of the following is TRUE about ATP? It is _______.
a. comprised of adenosine bound to two phosphate groups
b. comprised of a hydrogenous base adenine
