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This 3 page Class Notes was uploaded by Anoosha Mardani on Wednesday October 5, 2016. The Class Notes belongs to BIOL 1710 at University of North Texas taught by Mark Burleson in Fall 2016. Since its upload, it has received 10 views. For similar materials see BIOL SCI MAJORS 1 in Biochemistry at University of North Texas.
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Date Created: 10/05/16
Exam 2 Quiz When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs? a) The pH of the matrix changes b) ATP synthase pumps protons by active transport c) The electrons gain free energy d) NAD+ is oxidized The light reactions of photosynthesis supply the Calvin cycle with: a) Light energy in the form of photons b) CO2 &ATP c) H2O & NADPH d) ATP & NADPH Which of the following does not occur in the Calvin cycle? a) Carbon fixation b) Oxidation of NADPH c) Release of oxygen d) Regeneration of the CO2 acceptor Which of the following sequences correctly represents the flow of electrons during photosynthesis? a) NADPH → O → CO2 2 b) H 2 → NADPH → Calvin cycle c) H 2 → photosystem I → photosystem II d) NADPH → electron transport chain → O 2 Lipid-soluble signaling molecules, such as aldosterone, cross the membrane of all cells but affect only target cells because: a) Only target cells retain the appropriate DNAsegments b) Intracellular receptors are present only in target cells c) Only target cells have enzymes that break down aldosterone d) Only in target cells is aldosterone able to initiate the phosphorylation cascade that turns genes on The activation of receptor tyrosine kinases is characterized by: a) Dimerization & phosphorylation b) Dimerization & IP3 binding c) Aphosphorylation cascade d) Aligand molecule Binding of a signaling molecule to which type of receptor leads directly to a change in the distribution of ions on opposite sides of the membrane? a) Intracellular receptor b) G protein-coupled receptor c) Phosphorylated receptor tyrosine kinase dimer d) Ligand-gated ion channel In the cells of some organisms, mitosis occurs without cytokinesis. This will result in: a) Cells with more than one nucleus b) Cells that are unusually small c) Cells lacking nuclei d) Cell cycles lacking an S phase Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of microtubules, its effectiveness must be related to: a) Inhibition of DNAsynthesis b) Myosin denaturation and inhibition of cleavage furrow formation c) Disruption of mitotic spindle formation d) Suppression of cyclin production Which of the following does not occur during mitosis? a) Condensation of the chromosomes b) Replication of the DNA c) Separation of sister chromatids d) Spindle formation
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