Download Biology-1 Sample Questions for Exam Two Facilitated diffusion

Biology-1
Sample Questions for Exam Two
1. Facilitated diffusion
a. requires energy
b. is a process where molecules move against their concentration gradient
c. is an active process
d. involves the use of membrane proteins
e. c and d
2. Passive membrane transport processes include__________.
a. the movement of substances down their concentration gradient
b. the movement of water from an area of low water concentration to a area of high water concentration
c. the consumption of ATP
d. the use of transport proteins when moving substances from areas of low to high concentration
e. protein pumps to move substances
3. If two aqueous solutions that differ in solute concentration are placed on either side of a semipermeable membrane
and osmosis is allowed to take place, the water will,
a. Exhibit a net movement to the side with lower solute concentration
b. Exhibit a net movement to the side with lower water concentration
c. Exhibit an equal movement in both directions across the membrane
d. Not cross the membrane
e. Exhibit a net movement to the side with higher water concentration.
4. If a cell is placed in a 10% salt solution and it swells due to water gain, this cell
a. was placed in a hypertonic solution
b. was placed in a hypotonic solution
c. has a salt concentration greater than 10 %
d. b and c
e. is none of the above
5. Membrane proteins play a role in,
a. signal transduction by acting as receptors
b. transporting materials across the plasma membrane
c. metabolic pathways by acting as enzymes
d. a and b only
e. all of the above
6. Glucose molecules provide energy to power the swimming motion of sperm. In this example, the sperm are changing
a. chemical energy into kinetic energy
b. chemical energy into potential energy
c. kinetic energy into potential energy
d. kinetic energy into thermal energy
e. mechanical energy into chemical energy
7. Which of the following processes could result int eh net movement of a substance into a cell, if the substance is more
concentrated in the cell than in the surroundings?
a. Diffusion
b. Facilitated diffusion
c. Osmosis
d. Active transport
e. Passive transport
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Biology-1
Sample Questions for Exam Two
8. If a cell needed to acquire a large lipid substance it would most likely use which of the following transport
mechanisms?
a. Osmosis
b. Pinocytosis
c. Phagocytosis
d. Diffusion
e. Na+/K+ pump
9. Carbon dioxide crosses a plasma membrane by
a. osmosis
b. active transport
c. passive transport
d. pinocytosis
e. exocytosis
10. In an isotonic solution, an animal cell
a. Can lyse
b. will experience turgor
c. will neither gain nor lose water
d. will shrivel
e. will lose water
11. Small, nonpolar, hydrophobic molecules such as fatty acids
a. easily pass through a membrane's lipid bilayer.
b. very slowly diffuse through a membrane's lipid bilayer.
c. require transport proteins to pass through a membrane's lipid bilayer.
d. are actively transported across cell membranes.
e. usually enter the cell via endocytosis.
12. According to ___, energy cannot be created or destroyed.
a. Mrs. Marshall’s 4th law of effective studying
b. The first law of thermodynamics
c. Aristotle’s first principle
d. Einstein’s law of relativity
e. The second law of thermodynamics
13. Which of the following statements regarding enzyme function is false?
a. An enzyme's function depends on its three-dimensional shape.
b. Enzymes are very specific for certain substrates.
c. Enzymes are used up in chemical reactions.
d. Enzymes emerge unchanged from the reactions they catalyze.
e. An enzyme binds to its substrate at the enzyme's active site.
14. Which of the following substances could be a cofactor?
a. A ribosome
b. A polypeptide
c. Collagen
d. A protein
e. A zinc atom
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Biology-1
Sample Questions for Exam Two
15. Which of the following statements about the ATP molecule is true?
a. It contains five phosphate groups.
b. Extremely stable bonds link the second and third phosphate groups.
c. It contains the sugar glucose.
d. It releases energy when one phosphate group leaves ATP.
e. None of the above
16. True/False. Redox reactions power the synthesis of ATP in photosynthesis and in cellular respiration.
17. Why are most plants green?
a. Chlorophyll a reflects green light.
b. Chlorophyll a absorbs green light.
c. Chlorophyll b primarily uses green light as the source of energy for photosynthesis.
d. Green helps plants blend into their environment as a sort of camouflage.
e. All photosynthetic pigments are colored green.
18. Clusters of light-gathering pigments in a photosystem
a. pass energy to the reaction center.
b. are found in the roots of plants.
c. absorb electrons.
d. do not absorb photons.
e. break down H2O
19. As a result of the cascade of electrons down the electron transport chains of the light reactions,
a. NADPH is reduced to NADP+.
b. NADPH is oxidized to NADP+.
c. NADP+ is reduced to NADPH.
d. NADP+ is oxidized to NADPH.
e. water is formed.
20. Sunlight is a type of ________ energy.
a. electromagnetic
b. potential
c. stored
d. kinetic
e. nuclear
21. The summary equation for photosynthesis is
a. 6 CO2 + 6 H2O + sunlight → C6H12O6 + 6 O2.
b. C5H12O6 + 6 O2 + sunlight → 5 CO2 + 6 H2O.
c. C6H12O6 + 6 O2 + sunlight → 6 CO2 + 6 H2O.
d. the same as the equation for glycolysis written in reverse.
e. 6 CH2O + 5 O2 + sunlight → CO2 + 2 H2O.
22. CO2 and O2 escapes from a leaf via
a. Grana
b. stomata
c. stroma
d. thylakoids
e. central vacuole
23. Where is chlorophyll found in a plant cell?
a. Cytoplasm
b. Cristae
c. Stroma
d. Matrix
e. Thylakoid membrane
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Biology-1
Sample Questions for Exam Two
24. The oxygen released into the air is a product of photosynthesis comes from
a. Mitochondria
b. Carbon dioxide
c. Water
d. Glucose
e. chlorophyll
25. The addition of oxygen to RuBP by rubisco to form a two-carbon product that is then broken down by the cell to
carbon dioxide and water defines
a. Aerobic respiration
b. Cellular respiration
c. Photorespiration
d. Chemiosmosis
e. photophosphorylation
26. The electron transport chains of the light reactions
a. Are very different from those of cellular respiration
b. Shuttle (carry) electrons along in a series of redox reactions
c. Provide energy for the Krebs cycle
d. Are located in the stroma
e. Are found on the inner membrane of chloroplasts.
27. Which of the following is not a product of glycolysis?
a. CO2
b. pyruvate
c. NADH
d.ATP
e. a and b
28. What is the source of energy that excites the electrons of photosystems?
a.
b.
c.
d.
e.
Glucose
ATP
Electromagnetism
Cellular respiration
Photon
29. FAD acts as a(n) __________in cellular respiration.
a. reducing agent
b. oxidizing agent
c. electron donor
d. base
e. enzyme
30. The mitochondrion ATP synthase
a. is a nucleic acid complex.
b. transports H+ ions from the intermembrane space to the matrix
c. couples the flow of H+ to the phosphorylation of NAD+.
d. is embedded in the outer membrane of the mitochondrion.
e. helps transport H+ against the concentration gradient.
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Biology-1
Sample Questions for Exam Two
31. During cellular respiration, the energy in glucose
a. Is used all at once
b. Is used to manufacture glucose
c. Is carried by electrons
d. Can be used to oxidize NADH
e. Can be stored in molecules of ammonia
32. During cellular respiration, electrons move through a series of electron carrier molecules. Which of the following
statements about this process is true?
a. Oxygen is reduced when it accepts electrons and forms water
b. The electrons move from carriers that have more electronegativity towards carriers that have less electronegativity
c. Oxygen is eventually oxidized by the electrons to form water
d. The carrier molecules are found in the cytoplasm of eukaryotic and prokaryotic cells.
e. None of the above
33. A drug is tested in the laboratory and is found to create holes in both mitochondrial membranes. Scientists suspect that
the drug will be harmful to human cells because it will inhibit
a. Oxidative phosphorylation
b. Glycolysis
c. The Kreb’s cycle
d. The electron transport chain
e. The formation of alcohol
34. Which of the following metabolic pathways is common in aerobic and anaerobic respiration?
a. Oxidative phosphorylation
b. Chemiosmosis
c. The Kreb’s cycle
d. Glycolysis
e. Electron transport chain
35. The enzymes of the Kreb’s cycle are located in the
a. Inner mitochondrial membrane
b. Outer mitochondrial membrane
c. Intermembrane space of the mitochondrion
d. Mitochondrial matrix
36. The end products of the Kreb’s cycle include allof the following except,
a. NADH
b. Pyruvate
c. FADH2
d. CO2
e. ATP
37. In fermentation, ________is __________.
a. Pyruvate…oxidized
b. NADH…reduced
c. NADH…oxidized
d. Ethanol…oxidized
e. NAD+…oxidized
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Biology-1
Sample Questions for Exam Two
38. What are some important similarities between cellular respiration and photosynthesis?
The two following links have a variety of questions about cellular respiration and/or photosynthesis. Some questions do
not apply to our lecture material but you may still find them helpful. If you go directly to the links below, they will take
you to questions regarding cellular respiration. To get to other topics you will have to go back to the home page to access
other questions.
http://www.phschool.com/science/biology_place/biocoach/cellresp/quiz.html
http://highered.mheducation.com/sites/0073031208/student_view0/chapter9/multiple_choice.html
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