EXAM I: Biochemistry
Fill in the Blank 2 pts. each.
1. An atom is to a molecule, as monomer is to a(an) _______________________.
2. Dietary fiber is an example of the macromolecule called
3. A protein that functions as a biological catalyst in chemical reactions is called a/an
4. Most cholesterol is used to synthesize ____________________, which regulate the bodyâ€™s
5. A phospholipid contains __________________________ fatty acid tails.
6. Fats are described as saturated if they have the element _______________________ at every
7. Dehydration synthesis is critical in the _________________________ of one amino acid to
another amino acid.
8. Compounds that release H+ in solution are called ______________________________.
9. A solution with a pH of 4 has _____________________ free floating hydrogen ions than a
solution with a pH of 9.
10. Variations in the ____________________ of each amino acid will give rise to the variation in
the chemical nature of proteins.
11. An enzyme is the product of the ____________________________, which is stored in the
nucleus of the cell.
12. Carbohydrates are largely considered our source of _______________________ in the body.
Multiple Choice 2 pts. each.
________13. The chemical properties of an atom are determined by the number of
D. protons + neutrons.
________14. The core element of all the macromolecules is
________15. Proteins are formed using ______ different amino acids.
________16. Individual proteins can form globular shapes. This results from reactions among R
groups. These globular proteins exhibit the complexity ________ structure.
________17. The enzyme, Amylase, which digests starch and is found in the saliva is an
example of a/an
________18. Which of the following is (are) hydrophobic?
C. amino acids
________19. The reaction glucose + glucose ? disaccride is an example of
A. an exchange reaction.
B. a dehydration synthesis reaction.
C. a decomposition reaction.
D. a catalyzed reaction.
E. an exergonic reaction.
________20. Which of the following is a monomer?
________21. The formula for an amine group is
________22. A chain of 30 amino acids would be classified as a(an)
A. fatty acid.
B. nucleic acid.
________23. Proteins can serve all of the following functions except
A. catalyze metabolic reactions.
B. give structural strength to cells and tissues.
C. produce muscular and other forms of movement.
D. regulate transport of solutes into and out of cells.
E. store hereditary information.
________24. All of the following are minerals in the human body except
________25. In proteins the ______ determines the function.
A. the RNA
B. the structure
C. the cell
D. the hormones
Matching 2 pts each.
a. coded for in the DNA
b. nature exhibited by Crisco in water
c. made of phospholipids
________29. Nucleic Acids
d. uses deoxyribose as a sugar
e. example is high fructose corn syrup
________31. Cell Membranes
f. a sequence of these molecules is a gene
g. contains a sugar-phosphate backbone
________33. Amino Acids
h. estrogen and testosterone contain this molecule
i. monomer that is a source of nitrogen
j. needed for hormones, insulation and structure
Short Answer 2 pts each
36. Describe the structure of a phospholipid and how its nature towards water makes it an
ideal component of our cell membranes.
37. Why is carbon an ideal element for life forms?
38. What is the relationship between DNA and protein?
39. There is a diversity of enzymes/proteins produced in the body. How can we account for
40. What function do carbohydrates serve our bodies? Why are lipids, which contain more
covalent bonds per oz. than carbohydrates, not used for this function primarily?
41. Why are unsaturated fats supposedly better for us than the saturated fats?
42. What evidence exists for the statement â€œYou are what you eat.â€
43. What is the function of the DNA?
44. How does the body maintain a pH of 7.4?
45. How is it that cancer is a â€œDisease of the Genomeâ€?
46. What was the most interesting fact you learned in this section?