Test Item File- Practice Test Bank - Biochemistry Concepts and Connections,Appling,1e

Chapter 1 Biochemistry and the Language of Chemistry


1. The water content in the human body is approximately:
A. 90%.
B. 80%.
C. 70%.
D. 60%.
E. 50%.
ANS: C


2. The four most abundant chemical elements in living systems are:
A. hydrogen, oxygen, sulfur and phosphorus.
B. hydrogen, carbon, nitrogen and oxygen.
C. sodium, potassium, carbon and oxygen.
D. sodium, potassium, nitrogen and sulfur.
E. carbon, nitrogen, oxygen and potassium.
ANS: B
CHAPTER GOAL: 1.2


3. Nearly all proteins contain:
A. cobalt.
B. phosphorus.
C. selenium.
D. sulfur.
E. none of the above.
ANS: D
CHAPTER GOAL: 1.2
Global LO: G7

,4. Which of the following statements is FALSE?
A. Proteins can be structural components of cells.
B. Proteins can transmit signals between cells.
C. Proteins can transport molecules within cells and between cells.
D. Proteins can be both hormones and hormone receptors.
E. Proteins are the only biological polymer that can catalyze biochemical reactions.
ANS: E
CHAPTER GOAL: 1.2
Global LO: G7

,5. Which of the following is NOT classed as a lipid?
A. Cholesterol
B. Palmitic acid
C. Glycerol
D. Phosphatidyl serine
E. Triacylglycerol
ANS: C
CHAPTER GOAL: 1.2
Global LO: G7

6. Amino acids and simple organic compounds like carbon dioxide and hydrogen cyanide cannot be
produced without the use of enzymes.
ANS: FALSE
CHAPTER GOAL: 1.2
Global LO: G7


7. Oxidation-reduction reactions, which are the basis of many biochemical reactions and pathways,
cannot take place in the absence of oxygen.
ANS: FALSE
CHAPTER GOAL: 1.2
Global LO: G7


8. Many biochemical reactions that form biopolymers from monomeric units involve the removal of
water.
ANS: TRUE
CHAPTER GOAL: 1.2
Global LO: G7


9. The principle component of a biological membrane is a triglyceride.
ANS: FALSE
CHAPTER GOAL: 1.2
Global LO: G7

, 10. The chemical element ________ has a role in both transfer of energy as well as in the structure of
nucleic acids.
ANS: phosphorus
CHAPTER GOAL: 1.2
Global LO: G7


11. List the four major classes of biological macromolecules.
ANS: lipids, carbohydrates, proteins, nucleic acids
CHAPTER GOAL: 1.2
Global LO: G7