Download Quiz 2: Bio 160 Saunders

Quiz 2: Bio 160
Saunders
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Which of the following is a function of the plasma membrane?
A) control center of the cell
B) protein synthesis
C) fat synthesis
D) intracellular digestion
E) regulation of the passage of material into and out of the cell
2) All of the following molecules are part of the cell membrane except
A) lipid.
B) carbohydrates.
C) nucleic acids.
D) protein.
E) steroid.
3) Which of the following statements is correct about diffusion?
A) It requires an expenditure of energy by the cell.
B) It is an active process in which molecules move from a region of lower concentration to one of higher
concentration.
C) It is very rapid over long distances.
D) It requires integral proteins in the cell membrane.
E) It is a passive process in which molecules move from a region of higher concentration to a region of lower
concentration.
4) A balloon permeable to water but not to glucose contains a 10% glucose solution. A beaker contains a 5%
glucose solution. Which of the following is true?
A) The solution in the balloon is hypertonic relative to the solution in the beaker.
B) The solution in the beaker is hypertonic relative to the solution in the balloon.
C) When placed in the beaker, the balloon will lose water by osmosis.
D) The solution in the balloon is isotonic, and the solution in the beaker is hypertonic.
E) When placed in the beaker, the balloon will experience neither a net gain nor a net loss of water.
5) What compound directly provides energy for cellular work?
A) rubisco
B) ATP
C) DNA
D) fat
6) Which of the following is part of the first law of thermodynamics?
A) The entropy of the universe is constant.
B) Kinetic energy is stored energy that results from the specific arrangement of matter.
C) The entropy of the universe is decreasing.
D) Energy cannot be created or destroyed.
E) Energy cannot be transferred or transformed.
1
E) C6H12O6
7) ATP generally energizes a cellular process by
A) releasing ribose electrons to drive reactions.
B) releasing heat upon hydrolysis.
C) emitting light flashes.
D) acting as a catalyst.
E) direct chemical transfer of a phosphate group.
8) How does an enzyme catalyze a reaction?
A) by lowering the energy of activation of a reaction
B) by increasing the amount of energy of a reaction
C) by changing the equilibrium of a exergonic reaction
D) by lowering the energy of a reaction
E) by supplying the energy to speed up a reaction
9) The active site of an enzyme is the region that
A) binds with the substrate.
B) binds with allosteric inhibitors.
C) binds with the allosteric site.
D) is inhibited by a coenzyme or a cofactor.
E) none of the above
10) Ultimately, the energy found in food is found in _____.
A) NAD+
B) O2
C) pyruvic acid
D) ethyl alcohol
11) Which component reaction of cellular respiration produces the most NADH?
A) Krebs cycle (Citric Acid Cycle)
B) Calvin cycle
C) glycolysis
D) electron transport chain
E) hydrogenation
12) In cellular respiration, most ATP is produced directly as a result of _____.
A) fermentation
B) glycolysis
C) the Krebs cycle (Citric Acid Cycle)
D) the diffusion of H+ ions across the inner mitochondrial membrane
E) the electron transport chain
13) Which of the following equations best summarizes respiration?
A) 6 CO2 + 6 O2 C6H12O6 + 6 H2O
B) 6 CO2 + 6 H2O + 6 O2 C6H12O6
C) 6 CO2 + 6 H2O C6H12O6 + 6 O2
D) 6 O2 + 6 H2O C6H12O6 + 6 CO2
E) C6H12O6 + 6 O2 6 CO2 + 6 H2O
2
E) the electrons
14) The oxygen consumed during cellular respiration is directly involved in
A) accepting electrons at the end of the electron transport chain.
B) the phosphorylation of ADP.
C) the oxidation of pyruvate to acetyl CoA.
D) glycolysis.
E) the citric acid cycle.
15) Which process in eukaryotic cells will normally proceed whether O2 is present or absent?
A) oxidative phosphorylation
B) fermentation
C) glycolysis
D) the Krebs cycle (Citric Acid Cycle)
E) electron transport
16) All of the following substances are produced in a muscle cell under aerobic conditions except
A) NADH.
B) lactate.
C) acetyl CoA.
D) pyruvate.
E) ATP.
17) According to the second law of thermodynamics,
A) energy can be transferred or transformed, but it can be neither created nor destroyed.
B) the total amount of energy in the universe is conserved or constant.
C) for every action there is an equal and opposite reaction.
D) the entropy of the universe is constantly increasing.
E) every energy transfer requires activation energy from the environment.
18) Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?
A) K+
B) CO2
C) starch
D) an amino acid
E) glucose
19) What are the membrane structures that function in active transport?
A) cholesterol
B) nucleic acids
C) proteins
D) carbohydrates
E) cytoskeleton filaments
20) Which of the following statements describes the results of this reaction?
C6 H12O6 + 6 O2 6 CO2 + 6 H2 O + Energy
A) O2 is oxidized and H2 O is reduced.
B) CO2 is reduced and O2 is oxidized.
C) O2 is reduced and CO2 is oxidized.
D) C6 H12O6 is reduced and CO2 is oxidized.
E) C6 H12O6 is oxidized and O2 is reduced.
3