Download File - Principles of Biology 103

Chapter 3 Test Review
1. Organic molecules consist mainly of:
A. Carbon and Hydrogen atoms
2. Which is the largest form of a carbohydrate:
C. Polysaccharide
3. This type of lipid has four carbon rings and no tails:
D. Steroid
4. At what structural level does a protein become a working molecule:
D. Quaternary structure
5. The hydrophilic head portion of the phospholipid faces the:
C. Both A and B
6. Carbon’s importance to life arises from its ability to form these many versatile bonds:
B. 4
7. This type of lipid is used by plants to restrict water loss and animals to lubricate skin:
A. Waxes
8. Which of these would not cause a protein to denature:
D. Overuse
9. What is an example of saturated fat:
C. Butter
10. What is the building block of carbohydrates?
A. Monosaccharides
11. The nonadjacent regions that form to create specific domains is termed:
C. Tertiary structure
12. A nucleotide contains:
A. A five carbon ring bonded to a nitrogen base and a phosphate group(s)
13. The breakdown of large molecules by the enzymatic addition of water is an example of what
kind of reaction:
A. Hydrolysis
14. A saturated fat has:
A. No double bonds in its tail region
15. Amino acids are small organic compounds that are the basic subunits of:
C. Proteins
16. Metabolism refers to the enzyme-mediated chemical reactions by which cells:
A. Acquire and use energy as they build and break down organic molecules
17. What is the main structural component of plants:
C. Cellulose
18. What is the basic structure of a fatty acid:
A. A hydrophobic hydrocarbon tail with a hydrophilic carboxyl head
19. The linear series of amino acids linked together in a polypeptide chain is termed:
A. Primary structure
20. A small molecular group bonded to a carbon of an organic compound that imparts a specific
chemical property is this type of group:
A. Functional
21. Carbohydrates have a consistent carbon to hydrogen to oxygen ration of:
C. 1:2:1
22. In a cell membrane, phospholipids are arranged in a:
B. Bilayer
23. Peptide bonds link:
C. Amino Acids
24. When a protein denatures these bonds are broken:
C. Hydrogen
25. The building blocks of nucleic acids are:
D. Nucleotides
26. How do cells use monosaccharides:
C. For cellular fuel
27. Fatty, oily, or waxy compounds are:
B. Lipids
28. Sucrose is composed of:
C. Fructose and Glucose
29. Which lipid forms cell membranes:
B. Phospholipids
30. Which shows growth of a protein:
B. amino acid – peptide – polypeptide - protein
31. The bonding of glucose to galactose forms:
A. Lactose
32. Triglycerides contain:
A. Glycerol and fatty acids
33. Plants store their monosaccharides in this form:
A. Starch
34. Which is not a function of a protein:
D. Transport
35. Which is not a six carbon monosaccharide:
B. Sucrose
36. Which amino acid structure defines it and makes it unique:
C. R group
37. The formation of large molecules from small subunits is know as what kind of reaction:
C. Condensation
38. Animals store their monosaccharides in this form:
B. Glycogen
39. The polypeptide chain that twists and turns is termed:
B. Secondary structure
40. In a chain of nucleotides the sugar of one nucleotide is bonded to the ______________ of the next
nucleotide:
C. Phosphate