Download 2. test-multiple choice-Miller & Levine Biology Chapter 2 The Chemistry of Life - Answer

Miller & Levine Biology Chapter 2 The Chemistry of Life
1. all matter is made of what
A.
energy
B.
atoms
C.
electrons
D.
compounds
B
2. The positive particles of an atom are D
A.
electrons
B.
positrons
C.
neutrons
D.
protons
3. the central region of an atom where its neutrons and protons are is its A
A.
nucleus
B.
electron cloud
C.
core
D.
center
4. an atom with atomic number 6 would have how many protons A
A.
6
B.
12
C.
3
D.
cannot be determined
5. Particles in an atom that are neutral and have no charge are C
A.
negatrons
B.
electrons
C.
neutrons
D.
protons
6. What is the atomic number for an element with three protons? C
A.
2
B.
1
C.
3
D.
6
7. A particle that moves around the nucleus is a(n)...C
A.
Proton
B.
Neutron
C.
Electron
D.
Quark
8. Which of the following is a negatively charged subatomic particle? A
A.
Electron
B.
Proton
C.
Neutron
D.
Quark
9. The particles that are found in the nucleus of an atom are C
A.
neutrons and electrons
B.
electrons only
C.
protons and neutrons
D.
protons and electrons
10. The atomic number of an elements is the total number of which particles in the nucleus?
B
A.
neutrons
B.
protons
C.
electrons
D.
protons and electrons
11. Most of the mass in an atom is concentrated in the...B
A.
electrons
B.
nucleus
C.
protons
D.
empty space
12. A pure substance that consists entirely of one type of atom B
A.
atom
B.
element
C.
molecule
D.
compound
13. What quantities vary between isotopes of an element? D
A.
protons, electrons, and atomic mass
B.
protons, electrons, and atomic number
C.
neutrons and electrons
D.
neutrons and atomic mass
14. A substance formed by the chemical combination of two or more elements in definite
proportions C
A.
atom
B.
element
C.
compound
D.
molecule
15. What kind of bond forms when atoms share electrons? C
A.
Chemical bond
B.
Ionic bond
C.
Covalent bond
D.
Electron bond
16. What kind of bond forms when one kind of atom gives electrons to another kind of atom?
B
A.
Chemical bon
B.
Ionic bond
C.
Covalent bond
D.
Electron bond
17. ______ are formed when atoms are joined together by covalent bonds. C
A.
elements
B.
compounds
C.
molecules
18. What are Van der Waals forces?B
A.
The attraction of two surfaces at the surface level
B.
The attraction of two surfaces at the molecular level
C.
The attraction of two substances due to adhesive tape
D.
None of the above
19. A molecule in which the charges are unevenly distributed is said to be A
A.
polar
B.
nonpolar
C.
ionic
20. . Which property of water will cause water to bead up on glass? A
A.
Adhesion
B.
Cohesion
C.
Ability to dissolve substances
D.
High specific heat
21. Large bodies of water do not quickly fluctuate in temperature. Why? B
A.
Water is a solvent.
B.
Water has a high heat capacity.
C.
Water acts as a buffer.
D.
Water is non-polar.
22. Attractions between water molecules are called D
A.
Covalent bonds
B.
Ionic bonds
C.
Polar bonds
D.
Hydrogen bonds
23. What does pH measure? B
A.
Amount of Oxygen Ions
B.
Amount of Hydrogen/Hydronium Ions
C.
The amount of salt in a solution
D.
The density
24. A solution with a pH of 3.6 would be...A
A.
Acid
B.
Base
C.
Neutral
D.
Acid and Base
25. Water striders can walk across the surface of calm water. Their feet push the surface
of the water down slightly, but they do not break the surface. Why? A
A.
The insects are light enough so they do not break the hydrogen bonds holding the
water molecules together
B.
The insects actually use their wings to hover slightly above the water’s surface and
they only skim it with their feet.
C.
The insect’s feet are non-polar, so they are repelled by the polar water molecules and
are pushed away from the water’s surface.
D.
The insects are small enough to see the individual water molecules, so they are able
to step carefully from one molecule to the next
26. The pH scale is a range from:B
A.
1-7
B.
0-14
C.
1-14
D.
1-20
27.A solution with a pH of 8.6 would be... B
A.
Acid
B.
Base
C.
Neutral
D.
Acid and Base
28. A water molecule is a ________ molecule, which has one oxygen that has a __________
charge and two hydrogens that have a ___________ charge. C
A.
nonpolar, positive, negative
B.
polar, positive, negative
C.
polar, negative, positive
D.
nonpolar, negative, positive
29.What word describes when water is attracted to other substances? B
A.
cohesion
B.
adhesion
C.
capillary action
D.
surface tension
30. Weak acids or bases that can react with strong acids or bases to prevent, sharp,
sudden changes in Ph B
A.
Acids
B.
Bases
C.
Alkalines
D.
Buffers
31. Proteins are polymers formed from C
A.
lipids.
B.
carbohydrates.
C.
amino acids.
D.
nucleic acids.
32. DNA is a polymer formed from D
A.
fatty acids.
B.
monosaccharides.
C.
amino acids.
D.
nucleotides.
33. Living organisms use which macromolecule to store and transmit genetic
information?D
A.
Fat
B.
Protein
C.
Sugar
D.
Nucleic acid
34. Which is a Carbohydrate's monomer? C
A.
fatty acids
B.
Amino acids
C.
Monosacharide
D.
Nucleotide
35. Which two bio molecules have only Carbon, Hydrogen, and Oxygen? B
A.
Carbs/Nucleic Acids
B.
Lipids/Carbs
C.
Proteins/Nucleic Acids
D.
Carbs/Proteins
36. Organic molecules that always contain carbon, oxygen and hydrogen, often in a 1:2:1
ratio A
A.
carbohydrates
B.
functional groups
C.
enyzme
D.
monosaccaride
37. What is the primary function of carbohydrates in your body? B
A.
Speed up chemical reactions.
B.
Give immediate energy.
C.
Help to store energy.
D.
Build cell walls in plants.
38. A type of biological molecule that includes fats, oils, hormones, waxes, and
components of cellular membranes ...A
A.
lipids
B.
proteins
C.
carbohydrates
D.
nucleic acids
39. Which polymer group is used as STORED energy? B
A.
carbohydrate
B.
lipid
C.
protein
D.
amino acid
40. Which biomolecule helps form muscles? C
A.
Nucleic Acid
B.
Carbohydrate
C.
Protein
D.
Lipids