Download Answers to exam 1 review #2

Practice Exam: Go until you see stop
1.
Hydrolysis
a. breaks molecules apart
b. adds nitrogen to the molecule
c. has no effect on molecules
d. puts molecules back together
2.
Starch and cellulose are types of
a. polysaccharides
b. proteins
c. lipids
d. alcohols
e. dissacharides
3.
Which 3 out of the 4 macromolecules can be polymers?
a. carbohydrates
b. proteins
c. nucleic acids
d. lipids
4.
The 4 steps of cellular respiration, do not include:
a.
b.
c.
d.
e.
f.
5.
Citric acid cycle
Electron transport chain
Glycolysis
Transition reactions
Glucose synthesis
All of these are steps of cellular respiration
Glucose, a _______ Carbon sugar, breaks down into 2 __________ during glycolysis.
a.
b.
c.
d.
e.
3, ATP's
3, NADH's
6, ATP's
6, NADH's
None of the above
6.
During ____________ hydrogen ions accumulate, against their concentration gradient, in the intermembrane space of the
mitochondria.
a. photosythesis
b. b. cellular respiration in the mitochondria
c. cellular respiration in the cytoplasm
d. glycolysis
7.
In plant cells, the cell membrane can shrink while the cell wall remains in place, this is not:
a. plasmolysis
b. a hypertonic solution
c. hypotonic solution
8.
The structural level of a protein in which alpha helixes are present in the
a. Primary level
b. Secondary level
c. Tertiary level
d. Quaternary level
9.
The ________ of water gives rise to _______ bonds which allow for it to have many unique characteristics.
a. non-polarity, ionic
b. polarity, ionic
c. polarity, hydrogen
d. non-polarity, hydrogen
10. Active transport via the sodium potassium pump puts sodium.
a. at a higher concentration in the cell than outside
b. at a lower concentration in the cell that outside
11. OH groups are
a. acidic, increase
b. acidic, decrease
c. basic, increase
d. basic, decrease
meaning they
the pH of a solution.
12. A plasma membrane has a high percentage of saturated fatty acids. It is expected that this membrane will be ____ viscous
(solid) than a membrane composed of unsaturated
fatty acids.
a. less
b. more
c. the same
d. it's a trick question
e. it depends
13. Which of the following is an example of Active Transport?
a. Diffusion up an ion’s electrochemical gradient
b. Cotransport
c. Facilitated diffusion
d. All of the Above
e. A & B only
14. According to the fluid mosaic model of cellular membranes, which of the following is true?
a. the phospholipid bilayer is in a semi-solid state
b. phopholipids can diffuse laterally
c. all proteins embedded in the membrane are held tightly in place
d. None of the above
15. A label on a food package reads 0 grams of trans fat. Trans fat is not:
a. a stereo isomer
b. a triglyceride
c. a structural isomer
d. a saturated fat
e. an unsaturated fat
f. A & D
g. C & E
16. An amino acid always contains
a. a carboxyl group
b. a sulfur
c. an R group
d. a phosphate group
e. a & c
17. If the concentration of K+ is higher inside a cell than outside the cell, transporting K+ out of the cell will require which two of
the following
a. Active transport
b. Facilitated diffusion
c. Passive transport
d. Gated channel proteins
18. Which helps move a plasma membrane protein? Hint. It could be any number of the following.
A. ER
B. Vesicles
C. Golgi
D. Lysosome
E.
F.
Molecular motors
Microfilaments
19. An Enzyme speeds up an reaction by ___________
A.
B.
C.
D.
E.
decreasing activation energy of a reaction.
increase the ΔG of a reaction
decrease the Δ G of a reaction
increasing the activation energy of the reaction
none of the above
20. What of the following are not the product(s) of the citric acid cycleCO2
a.
NAPH and FAPH2
b.
c. ATP
d. H2O
e. Oxygen
Stop here
Modified True or False Write T or F at each question and if false correct then make it true.
21. ATP releases energy when the bond undergoes a dehydration reaction T F
22. Delta G is negative when the products have less free energy that the reactants T F
23. In the synthesis of ATP the products have less free energy that the reactants T F
24. When a reaction is spontaneous Delta G is positive T F
25. Oxidized NAD+ is highly energetic T F
26. Oxidizing NADH will use 3 ATP to complete the reaction T F
27. An enzyme releases free energy so a reaction can occur T F
28. An enzyme creates free energy so a reaction occurs more quickly T F
29. Mitochondria doesn't have which of the following:
a. inner matrix b. adenosine triphosphate c. acetyl coA d. inner membrane e. guanine
30. Mitochondria doesn't do which of the following.
a. cellular respiration b. formation of energy intermediates c. breakdown of glucose d. glycolysis e. citric acid cycle
31. Glycolysis requires CO2 T F
32. Glycolysis requires phosphorus T F
33. Changing the number of protons forms ions T F
34. What are the products of glycolysis Check all that apply.
a. ATP b. ADP c. NADH d. NAD- e. pyruvate f. glucose g. fructose-1,6-bisphosphate h. acetyl co A I. Water
35. Electrons in the inner membrane of the mitochondria turn ATP synthase T F
36. What is oxidative phosphorylation?
The production of ATP by E-transport, consuming oxygen in the process, and making ATP by putting protons in the inner
membrane space, leading to an electrochemical gradient that drives a rotary protein machine called ATP synthase.
37. Outer shell electrons are called________? Valence electrons
38. Rank the polarity of the following. OH CH OC NO NH
OH NH OC ON CH
39. What is a kink in a fat? A double bond
40. What is the difference between theory and hypothesis? A theory has been tested, a hypothesis has yet to be tested
41. Is a hydrophobic substance polar or non-polar? Non-polar
42. True or False. You can see proteins with a light microscope. F
43. What type of bonds hold DNA together? Hydrogen bonds
44. What is the difference between a solution and a solvent? Solvent is a single liquid of one molecule, and a solution is the
solvent plus the solution
45. Are glucose and fructose a structural or steroisomer? Structural
46. Hydrophobic forces cause which protein structure? Tertiary structure
47. The two types of electron microscopes are TSM and SEM? F
48. Myosin is a molecular motor moving along an actin filament T F
49. What does cholesterol do to membranes? Makes them more fluid
50. 9) Membrane permeability is what for small uncharged molecules, ionic molecules, water, proteins, potassium, polar molecules,
charged molecules, glucose, nonpolar molecules, hormones, macromolecules.
High, very low, medium, very low, very low, low – medium, very low, low, high, high, very low
Questions from the book publisher
51. Ions with a net negative charge are called _______, while ions with a net positive charge are called __________
a. electrons; protons
b. anions; cations
c. acids; bases
d. cation; anions
e. polar; nonpolar
52. The bonds created between monosaccharides to form polysaccharides are known as ________________ and are formed by
________________.
a. hydrogen bonds; condensation reactions
b. glycosidic bonds; hydrolysis
c. hydrogen bonds; dehydration synthesis
d. glycosidic bonds; dehydration synthesis