Biology 150: Principles of Cellular and Molecular BiologyBiology 150: Principles of Cellular and Molecular BiologyNovember 18, 2010Third Unit ExamPlease fill in your name and ID no. on the scantron answer sheet. Be sure to darken the circles beneath your name and ID number.Please enter the code for this exam (provided at the bottom on the last page of the exam) on your scantron sheet (left most column of CODES section). The code will eitherbe the number 1, 2, 3 or 4. It is critical that you darken the appropriate circle so that your exam will be scored correctly.Provide all answers on the answer sheet. If the question is of multiple-choice format, please choose the best answer from the responses that are given. Darken the circle on the answer sheet completely.Photosynthesis1. Which of the following statements best describes the relationship between the light-dependent and light-independent reactions of photosynthesis?a. the light-dependent reactions produce carbon dioxide, which is then used by the light-independent reactions.b. The light-dependent reactions pass electrons through an electron transport chain to the light-independent reactions.c. The light-independent reactions release energy, and the light-dependent reactions require energy.d. The light-dependent reactions produce ATP and NADPH, which are then used by the light-independent reactions.2. Which of the following statements is FALSE?a. carbon dioxide: 1 Cb. glyceraldehyde-3-phosphate: 3 Cc. ribulose bisphosphate: 6 Cd. glucose: 6 C13. Within photosynthesis, the source of oxygen isa. CO2b. H2Oc. NADP+d. glucosee. ATP4. What compound is generated via chemiosmosis by the movement of electrons “down” the electron transport chain of photosystem II?a. NADPHb. FADHc. ATPd. H2Oe. ADP5. Which of the following statements most accurately describes where chlorophyll is located in green plants?a. inner membrane of the mitochondriab. stroma of chloroplastc. thylakoid space within the thylakoidd. thylakoid membrane of the chloroplast6. Consider the following components of the Calvin cycle. Indicate the appropriate order of events as they would occur in the cycle.1. Regeneration of CO2 acceptor 2. Carbon fixation3. Reduction a. 1, 2, 3b. 2, 3, 1c. 3, 1, 2d. 1, 3, 2e. 3, 2, 17. What molecule reacts with ribulose bisphosphate in the Calvin cycle to produce an unstable six-carbon molecule?a. glyceraldehyde-3-phosphateb. H2Oc. NADPHd. CO2e. Bisphosphoglycerate28. Which of the following compounds serve as inputs for the Calvin cycle?a. O2, ATP, NADHb. CO2, NADPH, ADPc. CO2, glyceraldehyde-3-phosphate, ATPd. O2, ATP, NADPHe. CO2, ATP, NADPH9. Within the light dependent reactions, the final electron acceptor in Photosystem I isa. ADPb. NADPHc. NADP+d. NAD+e. O210. In the Calvin cycle, rubiscoa. catalyzes the addition (fixation) of CO2 to glyceraldehyde-3-phosphateb. catalyzes the addition (fixation) of CO2 to ribulose bisphosphatec. catalyzes the phosphorylation of ribulose bisphosphated. catalyses the reduction of 1,3 biphosphoglycerate to form glyceraldehyde-3-phosphate11. Which of the following compounds are outputs from the Calvin cycle?a. O2, H2O, ADP, NADP+b. CO2, H2O, ATP, NADP+c. ADP, NADP+, glyceraldehyde-3-phosphated. ADP, NADPH, glyceraldehyde-3-phosphate e. H2O, CO2, ADP, NADP+12. Which of the following compounds is oxidized in the light dependent reactions?a. CO2b. H2Oc. O2d. NADP+e. NADPH 13. Which of the following events is common to BOTH cellular respiration and photosynthesis?a. O2 is the final electron acceptor within the electron transport chainb. ATP is produced via energy obtained from a proton motive force or proton gradientc. CO2 is an output from both photosynthesis and cellular respirationd. H2O is a reactant that is required for both photosynthesis and cellular respiratione. sunlight is a source of energy for the production of sugars3Cell CommunicationIf the following statements numbered 14 through 18 defines an event in the signal transduction pathway for cyclic AMP, mark ‘a’. If the statement is true only for an event in the IP3 / DAG cell signaling system mark ‘b’. If the statement is true for both, mark ‘c’. If the statement is false for both, mark ‘d’.a. Cyclic AMP onlyb. IP3 / DAG onlyc. Both cyclic AMP and IP3 / DAG pathwaysd. Neither cyclic AMP nor IP3 / DAG pathways 14. Phosphodiesterase deactivates intracellular messenger15. Intracellular events include activation of protein kinases and phosphorylation of enzymes16. Plasma membrane receptors for this signal transduction pathway are linked to G proteins17. Signal molecule diffuses through the plasma membrane and binds to a receptor within the cytoplasm of the cell18. Involves activation of phospholipase C 19. Which of the following terminates cell signaling by dephosphorylating proteins?a. GTPaseb. Protein Phosphatase c. Phosphodiesterased. ATP20. A transcription factora. stimulates the synthesis of DNAb. stimulates the synthesis of mRNAc. stimulates the conversion of ATP to cyclic AMPd. phosphorylates enzymes in the cytosol of the cell e. is a ligand that binds to a G protein linked receptor on the extracellular surface of the plasma membrane21. Which of the following statements is FALSE in regards to the function of ligand-gated ion channels?a. binding of the signal molecule to the receptor alters the permeability of the channel protein for a particular ionb. binding of the signal molecule to an intracellular receptor will alter the transport of an ion through the plasma membranec. the term ligand refers to the signal molecule422. Estrogen is a steroid hormone that stimulates growth of the uterine wall. Which of the following events are likely involved in stimulating growth of smooth muscle cells in the uterine wall?a. binding of estrogen to a receptor on the external surface of the plasma membrane of smooth muscle cellsb. binding of estrogen to a receptor within the cytoplasm of the uterine smooth muscle cellc. stimulation of the expression of a gene within the genome of the smooth muscle celld. both a and c are truee. both b and c are true23. Protein kinases can change the activity of an enzyme bya. reducing the carbonyl group of the enzyme b. removing a phosphate group from the enzymec. adding a H+ to the enzymed. converting ATP to cyclic AMPe. adding a phosphate group to the enzyme 24. Adenylyl cyclasea. converts GTP into cyclic GMPb. converts ATP into cyclic AMPc. is a G protein that when activated stimulates the production