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Biology Practice Test - Unit 3: Chemistry of Life
____
1. Which phrase best describes atoms?
a. single-celled organism
b. smallest basic units of matter
c. parts of a nucleus
d. positively charged particles
____
2. Which of the following cannot be broken down by ordinary chemical means?
a. element
b. compound
c. molecule
d. bond
____
3. What is a compound?
a. two atoms of a single element bonded together
b. atoms of different elements bonded together in certain ratios
c. separate atoms of multiple elements in varying ratios
d. a molecule of two oxygen atoms
____
4. Atoms connected by covalent bonds share
a. pairs of electrons.
b. ionic compounds.
c. carbon and oxygen.
d. hydrogen ions.
____
5. Hydrogen bonds can form between regions of polar molecules that are
a. nonpolar.
c. oppositely charged.
b. negatively charged.
d. uncharged (neutral).
____
6. The attraction among molecules of different substances is called
a. cohesion.
b. adhesion.
c. specific heat.
____
____
____
7. Why is water necessary to your body?
a. It prevents large changes in blood pH.
b. It dissolves and transports substances.
d. surface tension.
c. It dissolves nonpolar fats and oils.
d. It forms the solutes in blood plasma.
8. A solution with a high concentration of H ions
a. shows a pH of 7. b. kills all
c. has a high pH.
organisms.
d. is very acidic.
9. Which category of carbon-based molecules includes sugars and starches?
a. fatty acids
b. phospholipids
c. proteins
d. carbohydrates
____ 10. Fats, oils, and cholesterol are all types of
a. cell membranes. b. hormones.
c. lipids.
d. fatty acids.
____ 11. Proteins are composed of which molecules?
a. amino acids
b. fatty acids
c. monosaccharides
d. nucleic acids
____ 12. DNA and RNA are two types of
a. proteins.
b. nucleic acids.
c. lipids.
d. carbohydrates.
____ 13. Which phrase best describes the effect of a catalyst on a chemical reaction?
a. increases the temperature
c. decreases the reaction rate
b. increases the volume of reactants
d. decreases the activation energy
____ 14. Enzymes affect chemical reactions in living organisms by
a. changing the direction of a reaction.
c. increasing the temperature range.
b. breaking down molecules into starch.
d. weakening bonds in reactants.
____ 15. The specific reactants that an enzyme acts on are called
a. catalysts
b. proteins.
c. substrates.
d. amino acids.
____ 16. Skip this question
a. a
d. d
b. b
c. c
____ 17. Together, all of the chemical processes that build up and break down materials in organisms are called
a. respiration.
b. photosynthesis.
c. metabolism.
d. homeostasis.
____ 18. What is the name of the negatively charged particles shown in this model of an atom?
a. electrons
b. protons
c. neutrons
d. prions
____ 19. To test whether a plant grows better in acidic or basic soil, the amount of water and sunlight the plants receive
must be controlled as factors called
a. observations.
b. dependent
c. independent
d. constants.
variables.
variables.
____ 20. Which of the following allows cells to stay within the range of conditions in which they function best?
a. biodiversity
b. adaptation
c. homeostasis
d. metabolism
21. Explain the relationship between monomers & polymers.
22. Identify the monomers that combine to form
Proteins Carbohydrates-
Nucleic Acids -
23. Cohesion is when molecules of the same type attract one another.Give an example of cohesion from your lab.
24. Identify the ion that is released by water when an acid is added to the water.
25. Sketch a water molecule and label the following parts.
-Hydrogen atoms
-oxygen atom
-the charge on the hydrogen atom
-the charge on the oxygen atom
26. Explain what is happening in the diagram below.
Biology Practice Test - Unit 3: Chemistry of Life
Answer Section
1. ANS: B
PTS: 1
REF: act0976aaf18007e0b3_81
TOP: 2.1 Quiz
NOT: 978-0-618-78317-5
2. ANS: A
PTS: 1
REF: act0976aaf18007e0b3_89
TOP: 2.1 Quiz
NOT: 978-0-618-78317-5
3. ANS: B
PTS: 1
REF: act0976aaf18007e0b3_97
TOP: 2.1 Quiz
NOT: 978-0-618-78317-5
4. ANS: A
PTS: 1
REF: act0976aaf18007e0b3_113
TOP: 2.1 Quiz
NOT: 978-0-618-78317-5
5. ANS: C
PTS: 1
REF: act0976aaf18007e0b5_81
TOP: 2.2 Quiz
NOT: 978-0-618-78317-5
6. ANS: B
PTS: 1
REF: act0976aaf18007e0b5_89
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.12
TOP: 2.2 Quiz
NOT: 978-0-618-78317-5
7. ANS: B
PTS: 1
REF: act0976aaf18007e0b5_97
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.12
TOP: 2.2 Quiz
NOT: 978-0-618-78317-5
8. ANS: D
PTS: 1
REF: act0976aaf18007e0b5_113
TOP: 2.2 Quiz
NOT: 978-0-618-78317-5
9. ANS: D
PTS: 1
REF: act0976aaf18007e0b7_89
TOP: 2.3 Quiz
NOT: 978-0-618-78317-5
10. ANS: C
PTS: 1
REF: act0976aaf18007e0b7_97
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.1 | FL.NGSSS.SCI.08.9-12.SC.912.L.18.3
TOP: 2.3 Quiz
NOT: 978-0-618-78317-5
11. ANS: A
PTS: 1
REF: act0976aaf18007e0b7_105
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.1 | FL.NGSSS.SCI.08.9-12.SC.912.L.18.4
TOP: 2.3 Quiz
NOT: 978-0-618-78317-5
12. ANS: B
PTS: 1
REF: act0976aaf18007e0b7_113
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.1
TOP: 2.3 Quiz
NOT: 978-0-618-78317-5
13. ANS: D
PTS: 1
REF: act0976aaf18007e0bb_33
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.11
TOP: 2.5 Quiz
NOT: 978-0-618-78317-5
14. ANS: D
PTS: 1
REF: act0976aaf18007e0bb_49
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.1 | FL.NGSSS.SCI.08.9-12.SC.912.L.18.4 |
FL.NGSSS.SCI.08.9-12.SC.912.L.18.11
TOP: 2.5 Quiz
NOT: 978-0-618-78317-5
15. ANS: C
PTS: 1
REF: act0976aaf18007e0bb_57
STA: FL.NGSSS.SCI.08.9-12.SC.912.L.18.1 | FL.NGSSS.SCI.08.9-12.SC.912.L.18.4 |
FL.NGSSS.SCI.08.9-12.SC.912.L.18.11
TOP: 2.5 Quiz
NOT: 978-0-618-78317-5
16. ANS: A
skip
PTS:
STA:
NOT:
17. ANS:
TOP:
1
REF: act0976aaf18007e0bb_65
FL.NGSSS.SCI.08.9-12.SC.912.L.18.11
TOP: 2.5 Quiz
978-0-618-78317-5
C
PTS: 1
REF: act0976aaf18007e0b1_109
Ch 2 Diagnostic Test
NOT: 978-0-618-78317-5
18. ANS: A
PTS: 1
REF: act0976aaf18007e0b1_125
TOP: Ch 2 Diagnostic Test
NOT: 978-0-618-78317-5
19. ANS: D
PTS: 1
REF: act0976aaf18007e0b1_149
TOP: Ch 2 Diagnostic Test
NOT: 978-0-618-78317-5
20. ANS: C
PTS: 1
REF: act0976aaf18007e0b1_165
TOP: Ch 2 Diagnostic Test
NOT: 978-0-618-78317-5
21. ANS:
Monomers are the small molecules that, when hooked together, make up large molecules known as polymers.
PTS: 1
22. ANS:
amino acids
sugars
nucleotides
PTS: 1
23. ANS:
Water on a penny and water on wax paper are examples of water molecules holding tightly to one another.
PTS: 1
24. ANS:
When an acid is added to water, a hydrogen (H+) ion is released.
(I would also accept “proton” instead of H+ ion.)
PTS: 1
25. ANS:
See your Power Notes, page 37 for this answer!!!
PTS: 1
26. ANS:
The molecule maltose attaches to the enzyme.
Then the enzyme helps break the maltose apart into 2 glucose molecules.
PTS: 1