11 Jun Which of the following could be found in the membranes
Question
General Biology I
Exam 2 Chapters 5, 6, 8
Spring Semester 2014
Form A Name
Section Multiple Guess: There is only one correct choice for each question.
1. Which of the following could be found in the membranes of animal cells? a) protein
b) phospholipid c) cholesterol d) all of the above e) none of the above.
2. Which of the following types of molecules would be most variable between different
membranes (excluding the plasma membrane)? a) protein b) lipid
c) carbohydrate d) nucleic acid e) they would be the same in all membranes in a cell.
3. Which of the following can be moved from one leaflet of a membrane to the other?
a) protein b) phospholipid c) carbohydrate d) nucleic acid e) none of the above.
4. What type of chemical bond would attach one phospholipid to another in a membrane?
a) covalent b) Hydrogen c) hydrophobic interaction d) ionic e) all of the above.
5. Which of the following would increase membrane fluidity at high temperatures?
a) lengthen the fatty acid chains in the phospholipids b) add more cholesterol
c) add more unsaturated fatty acids d) two of the above e) all of the above.
6. Which of the following organelles is primarily responsible for synthesizing membranes in the
cell? a) nucleus b) endoplasmic reticulum c) mitochondria d) microbodies
e) ribosomes.
7. The different functions of different membranes is due mostly to which of the following
components in the membrane? a) Phospholipids b) Cholesterol c) Proteins
d) Glycolipids e) Glycoproteins.
8. Which of the following only move solute down its concentration gradient, never against it?
a) Simple Diffusion b) Facilitated Diffusion c) Active Transport
d) two of the above e) none of the above.
9. When molecular Oxygen moves through a membrane, which of the following types of
transport is used? a) Simple Diffusion b) Facilitated Diffusion
c) Primary Active Transport d) Secondary Active Transport e) none of the above.
10. When monosaccharides and amino acids enter a cell, which of the following types of
transport is typically used? a) Simple Diffusion b) Facilitated Diffusion
c) Primary Active Transport d) Secondary Active Transport e) none of the above.
11. If water diffuses into a cell, in what type solution was the cell placed? a) isotonic b) hypertonic c) hypotonic d) none of the above.
12. Which of the following types of transport would move material down its concentration
gradient, but require the action of a protein transporter? a) Simple Diffusion
b) Facilitated Diffusion c) Active Transport d) two of the above e) none of the above.
13. A protein channel which opens and closes in response to the electrical charge across a
membrane would be termed which of the following? a) Primary Active Transport
b) Secondary Active Transport c) Ligand-gated Channel d) Voltage-gated Channel
e) all of the above.
14. A protein transporter which moves two solutes, in opposite directions through a membrane
would be termed which of the following? a) Uniport b) Symport c) Antiport
d) Diport e) any of the above depending on the solute.
15. What type of transport would be involved when a vesicle fuses with the plasma membrane
to secrete material from the cell? a) Endocytosis b) Receptor-mediated Endocytosis
c) Exocytosis d) two of the above e) all of the above.
16. Which of the following types of junctions functions to hold together adjacent cells?
a) Anchoring Junctions b) Tight Junctions c) Gap Junctions d) all of the above
e) none of the above.
17. An exergonic reaction would be expected to have which of the following?
a) +?G and Ke > 1 b) -?G and Ke > 1 c) +?G and Ke < 1
d) -?G and Ke < 1 e) any of the above are likely.
18. In the reaction A?B the Enthalpy of B = 5.6 Kcal/mole and that of A = 2.3 Kcal/mole.
What is ?G for this reaction? a) +3.3 Kcal/Mole b) -3.3 Kcal/mole c) + 7.9 Kcal/mole
d) – 7.9 Kcal/mole e) you can’t determine this from the information given.
19. In the reaction A?B the Enthalpy of B = 3.7 Kcal/mole and ?G = -2.4 Kcal/mole. What is
the Enthalpy of A? a) 8.88 Kcal/mole b) 6.1 Kcal/mole c) 1.54 Kcal/mole
d) 1.3 Kcal/mole e) you can’t determine this from the information given.
20. In the reaction A?B the Enthalpy of A = 3.7 Kcal/mole and ?G = +2.4 Kcal/mole. What is
the Enthalpy of B? a) 8.88 Kcal/mole b) 6.1 Kcal/mole c) 1.54 Kcal/mole
d) 1.3 Kcal/mole e) you can’t determine this from the information given.
21. In the reaction A?B, at chemical equilibrium there are 6 moles of A and 3 moles of B.
What is the chemical equilibrium value for this reaction? a) 6 b) 3 c) 2
d) 0.5 e) 18.
22. In the reaction A?B, chemical equilibrium is 4. If there are 6 moles of reactant at chemical
equilibrium, how much product would be expected? a) 24 moles b) 12 moles
c) 2 moles d) 1.5 moles e)0.67 moles. 23. In the reaction A?B chemical equilibrium is 3. If the reaction is begun with 12 moles of
reactant, how much product is expected at chemical equilibrium? a) 12 moles
b) 9 moles c) 6 moles d) 3 moles e) 2 moles.
24. In the reaction A?B chemical equilibrium is 0.5. If the reaction is begun with 9 moles of
reactant, how much reactant is expected to remain at chemical equilibrium? a) 9 moles
b) 6 moles c) 3 moles d) 1 moles e) 0.5 moles.
25. Which of the following occurs when a noncompetitive inhibitor binds an enzyme?
a) substrate is blocked by the inhibitor from binding to the active site.
b) the enzyme is denatured and loses all activity, permanently
c) the enzyme changes confirmation to an inactive shape
d) all coenzymes and cofactors are removed so the enzyme is inactive
e) any and all of the above could occur.
26. When feedback inhibition occurs the product of a metabolic pathway binds which of the
following? a) the first substrate in the pathway b) the last enzyme in the pathway
c) the fastest enzyme in the pathway d) an early enzyme in the pathway
e) any of the above.
27. Which of the following can denature enzymes? a) high heat b) strong acids
c) strong bases d) highly charged cations e) all of the above.
28. Which of the following wavelengths/colors of light would have the highest energy content?
a) blue b) green c) yellow d) red e) they have the same energy content.
29. Which of the following colors of light would be absorbed LEAST by a blue pigment?
a) blue b) green c) yellow d) red e) they would all be absorbed equally.
30. Light is absorbed by Photosystem I and used to energize electrons. To which of the
following are these high energy electrons most directly passed? a) carbon dioxide
b) NADP+ c) the electron transport chain d) Photosystem II e) RuBP.
31. How does the Carbon Dioxide used in Photosynthesis enter the plant?
a) it is produced metabolically through the breakdown of sugars
b) diffusion through the roots into the xylem c) diffusion through stomata into the leaves
d) it is actively transported up the stems e) none of the above – it is produced not
consumed during Photosynthesis.
32. High energy electrons from Photosystem I are passed to which of the following to be
passed out of the Photosystem? a) NADP Reductase b) ATP Synthase
c) NADP+ d) P700 e) the Electron Transport Chain Cytochrome Complex.
33. Which of the following are products of the Light-Dependent Reactions? a) ATP
b) Oxygen c) NADPH d) all of the above e) none of the above. 34. Which of the following are products of the Calvin-Benson Cycle? a) ATP
b) Glucose c) Oxygen d) NADPH e) all of the above.
35. Which of the following are produced when Hydrogen ions diffuse from the lumen of the
Thylakoid to the Stroma? a) ATP b) NADPH c) Carbon Dioxide
d) Glucose e) G3P.
36. The Oxygen released during Photosynthesis comes from the breakdown of which of the
following? a) Carbon Dioxide b) Glucose c) Water d) G3P e) RuBP.
37. Plants use the Glucose created during Photosynthesis to produce which of the following?
a) other Carbohydrates b) Proteins c) Fatty Acids d) Nucleic Acids
e) all of the above.
38. Where in a C4 plant does C3 Photosynthesis occur? a) Mesophyll Cells
b) Bundle Sheath Cells c) both of the above d) neither of the above.
39. Where in a C3 plant does C4 Photosynthesis occur? a) Mesophyll Cells
b) Bundle Sheath Cells c) both of the above d) neither of the above.
40. In a CAM desert Cactus, when does C4 Photosynthesis occur? a) at night
b) during the day c) both during the day and night d) none of the above.
41. Electrons lost by Photosystem II are replaced directly by those from which of the
following? a) Photosystem I b) the Electron Transport Chain c) Water
d) NADPH e) ATP Synthase.
42. Which of the following is used directly to regenerate RuBP during the Calvin-Benson
Cycle? a) G3P b) Glucose c) Carbon Dioxide d) 3PG e) NADPH.
43. C4 Photosynthesis is used to do which of the following? a) produce Fructose
b) produce Amino Acids c) pump Carbon Dioxide even at low concentrations
d) pump NADPH into the cytoplasm e) pump ATP out of the Chloroplast.
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