Download Chapter 1 Test Chapter 2 Test - Mr. Trepanowski`s CPA Biology

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Chapter 2 Test- The Chemistry of Life
Directions: Read each question and all of the answers carefully before choosing the
best answer. Use only the ScanTron form to mark your answers.
1. The smallest most basic unit of matter is the
a. Molecule
b. Atom
c. Compound
d. Cell
2. Which of the following is formed when an atom gains or loses electrons?
a. Element
b. Compound
c. Molecule
d. Ion
3. Atoms in molecules share pairs of electrons when they make
a. Covalent bonds
b. Ionic bonds
c. Hydrogen bonds
d. Polymers
4. What give water many properties that are important to living things?
a. Temperature
b. Hydrogen bonds
c. Density
d. Specific heat
5. What is unique about carbon?
a. Bonding properties
b. Ability to bond with oxygen
c. Properties as a reactant
d. Properties as an enzyme
6. Which phrase best describes an atom?
a. Substance made of different elements
b. Smallest basic unit of matter
c. Substance that includes covalent bonds
d. Contains electrons in its nucleus
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7. The four main types of carbon-based molecules in organisms are carbohydrates,
lipids, nucleic acids, and
a. Starches
b. Fatty acids
c. Phospholipids
d. Proteins
8. How do ions form?
a. Atoms combine to make a larger atom
b. Two atoms share electrons
c. Atoms form covalent bonds
d. Atoms gain or lose electrons
9. How are atoms held together in molecules?
a. They form covalent bonds
b. They form ions
c. They break hydrogen bonds
d. They combine to form polymers
10. Which property of water is the result of hydrogen bonds?
a. Polarity of water molecules
b. High specific heat
c. Low boiling point
d. No cohesion among water molecules
11. Which property of carbon makes it the “building block of life”?
a. Its covalent bonding
b. Its ability to dissolve substances
c. Its specific heat
d. Its hydrogen bonding
12. What are the four main groups of carbon-based molecules?
a. Starches, cholesterol, fatty acids, and amino acids
b. Sugars, cellulose, phospholipids, and starches
c. Polymers, monomers, nucleotides, oils
d. Proteins, lipids, nucleic acids, and carbohydrates
13. Proteins are composed of which molecules?
a. Amino acids
b. Fatty acids
c. Polymers
d. Nucleic acids
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14. DNA and RNA are two types of
a. Proteins
b. Nucleic acids
c. Lipids
d. Carbohydrates
15. Which category of carbon-based molecules includes sugars and starches?
a. Proteins
b. Nucleic acids
c. Lipids
d. Carbohydrates
16. Fats, oils, and cholesterol are all types of
a. Cell membranes
b. Hormones
c. Lipids
d. Phospholipids
17. Hydrogen bonds can form between regions of polar molecules that are
a. Nonpolar
b. Negatively charged
c. Oppositely charged
d. Uncharged (neutral)
18. The attraction among molecules of different substances is called
a. Cohesion
b. Adhesion
c. Specific heat
d. Surface tension
19. Which of the following cannot be broken down by ordinary chemical means?
a. Element
b. Compound
c. Molecule
d. Bond
20. 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
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21. What is the name of the negatively charged particles that surround the nucleus of
an atom?
a. Electrons
b. Protons
c. Neutrons
d. Prions
22. Chemical reactions change substances into different substances by
a. Reaching chemical equilibrium
b. Breaking and forming bonds
c. Changing the substance’s properties
d. Maintaining constant energy
23. Which aspect of a chemical reaction is affected by enzymes?
a. Directions
b. Rate
c. Equilibrium
d. pH
24. What is the term for the substances that are changed during a chemical
reaction?
a. Products
b. Catalysts
c. Enzymes
d. Reactants
25. The function of a catalyst in a chemical reaction is to increase the
a. Reaction rate
b. Activation energy
c. pH
d. number of substrates
26. Which phrase best describes the effect of a catalyst on a chemical reaction?
a. Increase the temperature
b. Increase the volume
c. Decrease the reaction rate
d. Decrease the activation energy
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27. The specific reactants that an enzyme acts on are called
a. Catalysts
b. Proteins
c. Substrates
d. Amino acids
28. What are two functions of carbohydrates?
a. Energy and transportation
b. Structure and function
c. Defense and to build proteins
d. Energy and structure
29. Which of the following foods would probably contain the most protein?
a. A cheeseburger
b. French fries
c. A Coke
d. An apple
30. A polymer is
a. Molecular subunit of a monomer
b. Also known as an amino acid
c. Made up of only one monomer
d. Made up of many monomers
31. If you were to place drops of water on a penny, the water would form a bubble
that overhangs the edges of the penny. Which of the following is the scientific
principle responsible for this observation?
a. Adhesion caused by hydrogen bonds
b. Cohesion caused by covalent bonds
c. Ionic bonds caused by oppositely charged ions
d. Cohesion caused by hydrogen bonds
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For questions 32 and 33 use the following information:
A students placed two pieces of liver (one that had been refrigerated and one
that had been boiled) in hydrogen peroxide. The student observed that the liver
that had been refrigerated caused a much faster chemical reaction than the liver
that had been boiled.
32. In this experiment, what is the independent variable?
a. The hydrogen peroxide
b. The speed of the chemical reaction
c. The enzyme
d. The type of liver
33. Liver was used in this experiment because
a. Liver contains lipids that act as catalysts
b. Liver contains phospholipids that speed up chemical reactions
c. Liver contains a particular enzyme that speeds up this reaction
d. Liver contains a particular catalyst that slows down this reaction
Extra Credit
34. Which one of the following is not a characteristic of life?
a. Growth
b. Movement
c. Energy use
d. Made of cells
35. Fill in the blank: Please do not have any _____________ towards me if you do
poorly on this test.
a. Allocate
b. Append
c. Asinine
d. Animosity
36. Which of the following medical conditions does Mr. Trepanowski have?
a. Color blindness
b. Arthritis
c. Diabetes
d. Asthma