EXAM# __________
Do Not Write On Exam
ID: A
L2 Biology - Organic Chemistry Exam
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.(1 pt each)
____
1. Amino acid is to protein as
a. fat is to lipid. b. DNA is to RNA. c. sugar is to fat. d. simple sugar is to starch.
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2. A monosaccharide is a
a. carbohydrate. b. lipid. c. nucleic acid. d. protein.
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3. Which of the following organic compounds is the main source of energy for living things?
a. carbohydrates b. lipids c. nucleic acids d. proteins
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4. Which statement is true?
a. Simple sugars are made of polysaccharides. b. Glycerol is made of fatty acids. c. RNA molecules are
made of nucleotides. d. Amino acids are made of proteins.
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5. Identify the reactant(s) in the chemical reaction, CO2 + H2O → H2CO3.
a. CO2, H2O, and H2CO3 b. CO2 and H2O c. H2CO3 d. CO2
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6. What is the term used to describe the energy needed to get a reaction started?
a. adhesion energy b. activation energy c. cohesion energy d. chemical energy
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7. Which of the following is a form of energy released during a chemical reaction?
a. heat b. sound c. light d. all of the above
____
8. Which of the following statements about enzymes is NOT true?
a. Enzymes work best at a specified pH. b. All enzymes work inside cells. c. Enzymes are proteins.
d. Enzymes are organic catalysts.
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9. A substance that accelerates the rate of a chemical reaction is called a(an)
a. catalyst. b. lipid. c. molecule. d. element.
____ 10. Enzymes affect the reactions in living cells by changing the
a. products of the reaction. b. speed of the reaction. c. temperature of the reaction. d. pH of the reaction.
____ 11. The type of chemical bond which joins 2 monosaccharides is called a(n)
a. Ionic bond b. Oxygen bridge c. peptide bond d. hydrogen Bond
____ 12. Which of the following bonds is a flexible bond which joins 2 amino acids.
a. ionic bond b. oxygen bridge c. peptide bond d. hydrogen bond
____ 13. The type of chemical reaction which joins many organic molecules is..
a. hydrophobic interaction b. dehydration synthesis c. hydrolysis d. dehydrohydrolysis
____ 14. The level of protein structure which determines an enzyme's final shape is its
a. Primary structure b. Secondary structure c. Tertiary structure d. Quaternary structure
____ 15. Which of the following is a polymer
a. Protein b. Monosaccharide c. Amino acid d. nucleotide
____ 16. The chemical reaction which joins 2 monosaccharides through the removal of water is called?
a. Hydration b. Respiration c. Hydrolysis d. Dehydration synthesis
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ID: A
____ 17. When a fatty acid is completely filled with hydrogen and has n o double bonds, its known as
a. Dehydrogenated b. Unsaturated c. polyunsaturated d. Saturated
____ 18. Animals store their energy in the form of which carbohydrate?
a. Monosaccharide b. Starch c. Glycogen d. cellulose
____ 19. Genetic information is encoded in molecules of
a. Proteins b. Nucleic acids c. Carbohydrates d. Steroids
____ 20. Heart helthier fats are generally liquid at room and body temp. because ?
a. They contain no double bonds b. They have no hydrogen in them c. they are made from straight fatty
acids d. They are made from bent fatty acids
____ 21.
A protein's final shape is ultimately determined by its...
a. Primary structure b. Secondary structure c. Tertiary structure d. Quarternary structure
____ 22. A molecule shaped like a double helix (spiral staircase) is?
a. RNA b. DNA c. ATP d. HDLA
____ 23. Which of the following is NOT an organic molecule?
a. Cellulose b. Water c. Fat d. Protein
____ 24. How many different amino acids are there?
a. 4 b. 8 c. 20 d. 3.5 Billion
____ 25. How many different kinds of nitrogen bases are found in a molecule of DNA?
a. 4 b. 10 c. 20 d. 3.5 Billion
Matching
Match the name of the chemical test with the substance that it tests for.
a. Monosaccharides
c. Proteins
b. Starches
d. H+ concentration
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____
____
____
26.
27.
28.
29.
Biuret test
Benedicts test
pH Test strips
Iodine Test
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ID: A
Short Answer
For the following questions, match the letter of the proper biological molecule with the letter from the picture
below. (1pt each)
30. Lipid _____
31. Carbohydrate _____
32. Nucleic Acid _____
33. Protein _____
For the following questions, match the letter of the biological molecule subunit with its proper name. (1 each)
34. Amino Acid _____
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ID: A
35. Nucleotide _____
36. Monosaccharride _____
37. Fatty Acid _____
Problem
38. On the separate sheet of paper, complete the following chemical reaction showing the dehydration synthesis
of two amono acids to form a dipeptide. (Note: you need to show the entire reaction in your answer.)
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ID: A
L2 Biology - Organic Chemistry Exam
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
D
A
A
C
B
B
D
B
A
B
B
C
B
A
A
D
D
C
B
D
A
B
B
C
A
MATCHING
26.
27.
28.
29.
C
A
D
B
SHORT ANSWER
30.
31.
32.
33.
B
A
D
C
1
ID: A
34.
35.
36.
37.
D
A
C
B
PROBLEM
38.
2