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Midterm

LIFESCI 7A Midterm: LS7A Midterm Review SessionExam


Department
Life Sciences
Course Code
LIFESCI 7A
Professor
Maloy
Study Guide
Midterm

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Life Science 7A Midterm 1 Review Session
Midterm 1 Review Session
1. T/F Feedback inhibition only acts through enzymes (false and products)
2. T/F In the first reaction of glycolysis, glucose receives a phosphate group from ATP. This
reaction is endergonic. (true)
3. T/F Chlorophyll is located in the inner membrane of the chloroplast (false it’s outer
membrane)
4. T/F Anabolic reactions are endergonic (true)
5. T/F The utilization offood” in the mitochondria, with the associated formation of ATP, is
termed cellular respiration (true)
6. T/F A prokaryotic cell does not have a nucleus, whereas a eukaryotic cell does. (true)
7. T/F Plants undergo cellular respiration (true)
8. T/F A symport is a type of cotransporter (true)
9. T/F A lysosome is a membrane bound sac that transports substances in cells (false vesicles)
10. T/F Ribosomes are found in the rough endoplasmic reticulum. (true)
11. T/F The interior of the phospholipid bilayer is charged. (false, not charged)
12. T/F An enzyme slightly changes shape when it binds to a substrate. (true)
13. An example of a uniport is a proton pump (true)
14. T/F Proteins are modified and packaged in the golgi apparatus (true)
15. T/F Enzymes lower the activation energy. (true)
16. T/F An enzyme may orient substrates, induce strain, or donate and accept electrons (true)
17. T/F Lysosomes have an acidic interior (true)
18. T/F Most enzymes are much smaller than their substrates. (false, no significant relationship
b/w size)
19. T/F The interior of the phospholipid bilayer is aqueous. (false)

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Life Science 7A Midterm 1 Review Session
20. T/F Positive allosteric regulators stabilize the active form of the enzyme. (true)
21. T/F All enzymes are allosterically regulated. (false)
22. T/F Both the active site and the regulatory site are present on the same subunit. (false)
23. T/F Factors that can either activate or inhibit allosteric enzymes are called regulators (true)
24. T/F K-Cl bond is more likely to form an ionic bond than F-I (true)
25. T/F Cellular respiration creates energy for an animal cell (false energy is not CREATED
but CONVERTED from glucose to ATP
26. T/F An active site is the part of the substrate that binds with an enzyme. (false it’s the part
of the enzyme that binds with substrate)
27. T/F During the citric acid cycle, energy stored in acetyl CoA is used to create a proton
gradient. (false)
28. T/F Cytoskeleton provide a framework for the cell (true)
29. HF is an example of a nonpolar covalent bond (false it’s a polar covalent bond)
30. T/F Carbon dioxide is a waste product of cellular respiration (true)
31. T/F An antiport is an integral membrane transport protein that transports two different
molecules at different times (false simultaneously)
32. T/F Allosteric inhibitors bind to the active site, blocking enzyme function. (false,
competitive inhibitors)
33. T/F Chloroplast and mitochondria contain cristae? (false just mitochondria)
34. T/F The interior of the phospholipid bilayer is hydrophobic. (true)
35. T/F Lysosomes are formed from the Golgi apparatus (false)
36. T/F FADH is a reducing agent (false it’s oxidizing agent)
37. T/F Metabolism is all of the chemical reactions in the cell. (true)
38. T/F Ribosomes are involved in protein synthesis (true)

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Life Science 7A Midterm 1 Review Session
39. T/F Enzymes are highly specific. (True)
40. T/F The outer mitochondrial membrane is freely permeable to protons (true)
41. Feedback inhibition works to prevent a build up of excess products (true)
42. T/F A prokaryotic cell does not have DNA, whereas a eukaryotic cell does. (false,
prokaryotic doesn’t have nucleus)
43. T/F Proteins can be imbedded into the plasma membrane (true)
44. In osmosis, solute goes from low concentration to high concentration (true)
45. T/F Catabolic breakdown molecules so they require energy (false they release energy
because they are exergonic)
46. T/F Disorder in the environment always increases after a chemical reaction (true)
47. T/F Gibbs free energy is the energy difference between the transition state and reactants
(false products and reactants)
48. T/F In exergonic reactions, delta G > 0 (false, delta G <0)
49. T/F In endergonic reactions, products have less energy (false they have higher energy)
50. How many ATP molecules are used in the Krebs cycle?
a. 0 (glycolysis is the only step that USES ATP)
b. 2
c. 4
d. 38
51. T/F Non-competitive inhibition is when the substrate binds to a different site than active
site (true)
52. T/F Facilitated diffusion is a type of simple diffusion (true because its passive)
53. T/F Ion channels are called aquaporins(false)
54. T/F Endocytosis is when particles packaged inside the cell are secreted from the cell (false
that is exocytosis, endocytosis is when things are brought into the cell)
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