Bio test 2 review - BISC207 PDF

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1. The oxygen consumed during cellular respiration is involved directly in which process or event? a. Accepting electrons at the end of the electron transport chain b. Aerobic respiration 2. What event takes place in the electron transport chain a. The extraction of energy from high-energy electrons remaining from glycolysis and the citric acid cycle Substrate level phosphorylation--ATP is taken from something and put somewhere else 3. When oxygen is released as a result of photosynthesis, it is a direct byproduct of a. Oxygen comes from light dependent reactions where you split water to put electrons into photosystem II b. Answer: Splitting water molecules 4. What is the sequence of the flow of electrons during photosynthesis (what are the light dependent reactions also called? The calvin cycle) a. H2O→NADPH→Calvin cycle NADPH--electron acceptor in photosystem I 5. Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell through a. Plasmodesmata--only found in plant cells b. Intermediate filaments--found in the cytoskeleton, not going to move c. Desmosomes--proteins that are connected to intermediate filaments--cell to cell adhesion d. Gap junctions--connects cells so that materials can travel from one cell to another 6. Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have 1 ½ times more DNA that G1 phase cells. The cells of this group are a. In the S phase of the cell cycle 7. The drug cytochalasin B blocks the function of actin. Which of the following aspects of the cell cycle would be most disrupted by cytochalasin B? a. Cleavage furrow formation and cytokinesis 8. Some cells have several nuclei per cell. How could such multinucleated cells be explained? a. The cell underwent repeated mitosis, but cytokinesis did not occur...