8. The figure below illustrates a eukaryotic cell. Which of the following best describes how the three structures indicated by the arrows work together? Rough ER Golgi аpparatus Yesicle

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Chapter5: Structure And Function Of Plasma Membranes
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8. The figure below illustrates a eukaryotic cell. Which of the following best describes how the
three structures indicated by the arrows work together?
Rough ER
Golgi
apparatus
Vesicle
(A) To synthesize lipids and modify toxic substances in order to render them harmless
(B) To synthesize and isolate proteins for secretion or for use in the cell
(C) To catabolize nutrients and produce ATP for intracellular energy storage
(D) To synthesize all ribosomal proteins
9. Two nutrient solutions are maintained at the same pH. Actively respiring mitochondria are
isolated and placed into each of the two solutions. Oxygen gas is bubbled into one solution. The
other solution is depleted of available oxygen. Which of the following best explains why ATP
production is greater in the tube with oxygen than in the tube without oxygen?
(A) The rate of proton pumping across the inner mitochondrial membrane is lower in the sample
without oxygen.
(B) Electron transport is reduced in the absence of a plasma membrane.
(C) In the absence of oxygen, oxidative phosphorylation produces more ATP than does
fermentation.
(D) In the presence of oxygen, glycolysis produces more ATP than in the absence of oxygen.
10. Membrane-bound organelles have been an important component in the evolution of complex,
multicellular organisms. Which of the following best summarizes an advantage of eukaryotic
cells having internal membranes?
(A) Eukaryotic cells are able to reproduce faster because of the presence of organelles.
(B) Some organelles, such as mitochondria and chloroplasts, are similar to prokaryotic cells in
structure.
(C) Organelles isolate specific reactions, increasing metabolic efficiency.
(D) Compartmentalization leads to a higher mutation rate in DNA, which leads to more new
species.
:00
Transcribed Image Text:8. The figure below illustrates a eukaryotic cell. Which of the following best describes how the three structures indicated by the arrows work together? Rough ER Golgi apparatus Vesicle (A) To synthesize lipids and modify toxic substances in order to render them harmless (B) To synthesize and isolate proteins for secretion or for use in the cell (C) To catabolize nutrients and produce ATP for intracellular energy storage (D) To synthesize all ribosomal proteins 9. Two nutrient solutions are maintained at the same pH. Actively respiring mitochondria are isolated and placed into each of the two solutions. Oxygen gas is bubbled into one solution. The other solution is depleted of available oxygen. Which of the following best explains why ATP production is greater in the tube with oxygen than in the tube without oxygen? (A) The rate of proton pumping across the inner mitochondrial membrane is lower in the sample without oxygen. (B) Electron transport is reduced in the absence of a plasma membrane. (C) In the absence of oxygen, oxidative phosphorylation produces more ATP than does fermentation. (D) In the presence of oxygen, glycolysis produces more ATP than in the absence of oxygen. 10. Membrane-bound organelles have been an important component in the evolution of complex, multicellular organisms. Which of the following best summarizes an advantage of eukaryotic cells having internal membranes? (A) Eukaryotic cells are able to reproduce faster because of the presence of organelles. (B) Some organelles, such as mitochondria and chloroplasts, are similar to prokaryotic cells in structure. (C) Organelles isolate specific reactions, increasing metabolic efficiency. (D) Compartmentalization leads to a higher mutation rate in DNA, which leads to more new species. :00
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