Biology 150: Principles of Cellular and Molecular BiologyBiology 150: Principles of Cellular and Molecular BiologyOctober 26, 2010Second 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.1. All of the following are part of a prokaryotic cell excepta. ribosomesb. DNAc. cell walld. plasma membranee. endoplasmic reticulum2. Which of the following statements provide a true difference between facilitated diffusion and simple diffusion?a. membrane proteins help move molecules across the membraneb. molecules move from a region of higher concentration to a region of lower concentrationc. no energy is used to move molecules across the membraned. water moves through membranes by facilitated diffusion3. Which of the following types of reactions would decrease the entropy within a cell?a. digestionb. dehydration reactionsc. catabolismd. hydrolysise. respiration14. During electron transport, energy from _____ is used to pump hydrogen ions into the _____.a. NADH and FADH2 ... mitochondrial matrixb. NADH and FADH2 ... intermembrane space of the mitochondriac. NADH ... intermembrane space of the mitochondriad. acetyl CoA ... intermembrane space of the mitochondriae. NADH ... mitochondrial matrix5. The active site of an enzyme is defined asa. a specific region on the substrate where a competitive inhibitor bindsb. a specific region on the enzyme where the substrate bindsc. a specific region on the substrate where the reactant bindsd. a specific region on the enzyme where a coenzyme binds6. A substance that inhibits enzyme action but does not bind to the active site of the enzyme is termeda. a competitive inhibitor of enzyme actionb. a non-competitive inhibitor of enzyme actionc. a non-competitive substrated. a coenzyme7. The free energy of the products is greater than the free energy of the reactants fora. an endergonic reactionb. a spontaneous reactionsc. an exergonic reactiond. a reaction that has a ∆G less than zero8. The nuclear envelopea. contains openings or pores that allow movement of materials from the nucleus to the cytoplasmb. is present in all prokaryotic cellsc. consists of a single membrane consisting of a lipid bilayer with both integral and peripheral proteinsd. is a membrane that encloses the central vacuole in plant cells 9. Which of following cell organelles is present in animal cells but NOT in plant cells?a. chloroplastsb. plastids c. lysosomesd. ribosomese. smooth endoplasmic reticulum210. In animal cells, the centrosome a. is located in the nucleus of the cell b. is the site of synthesis of ribosome componentsc. is the organizing center for the synthesis of microtubulesd. shuttles materials from the Golgi apparatus to the plasma membrane 11. Which of the following compounds has net input for glycolysis? (Hint: Net input is defined as more molecules are required than are produced.) a. FADH2 b. NAD+c. NADHd. O2e. ATP12. In addition to ATP, which of the following compounds are products of oxidative phosphorylation? a. oxygen, water, and CO2 b. oxygen, water, and NADHc. carbon dioxide, water, and NAD+d. water, NAD+ and FAD e. water, NAD+, and FADH2 For the following questions (13 -18) use the lettered answers to match the structure to its proper cell type. Choose the cell type that best correlates with the term in the numbered list. Answers may be used more than once if necessary.a. only found in prokaryotic cellsb. only found in eukaryotic cellsc. found in both eukaryotic and prokaryotic cells13. nucleoid 14. Golgi apparatus 15. nuclear envelope16. DNA17. enzymes that function in glycolysis 18. ribosomes319. An amino acid sequence (i.e., primary structure) has been determined for a large protein within the plasma membrane. A significant number of amino acids within the center of the protein have hydrophobic side chains. This segment of the protein likely is locateda. on the extracellular surface of the plasma membraneb. on the intracellular surface of the plasma membranec. within the interior or lipid bilayer portion of the plasma membrane 20. During osmosisa. water moves from a hypotonic solution to a hypertonic solutionb. water moves from a hypertonic to a hypotonic solutionc. solutes diffuse from a hypertonic to a hypotonic solutiond. solutes diffuse from a hypotonic solution to a hypertonic solutione. water and solutes diffuse from a hypotonic solution to a hypertonic solution21. Which of the following processes includes all of the others?a. facilitated diffusionb. active transportc. carrier-mediated transport22. Which of the following is NOT a possible function of proteins within the plasma membrane?a. receptors that bind to molecules that approach the extracellular surface of the membraneb. channels or pores that allow movement of materials across the plasma membranec. enzymes that function within the Krebs or citric acid cycled. anchors for components of the extracellular matrix23. The prefix ‘glyco’ within the term glycoprotein refers to thea. lipid portion of the moleculeb. carbohydrate portion of the moleculec. the C terminal of the protein moleculed. the N terminal of the protein moleculee. the region of the protein located on the intracellular surface of the plasma membrane 4Questions no. 24 – 28 refer to the above diagram. If needed, use the appropriate letter from the graph to answer the questions below.24. The chemical reaction as shown above (proceeding from left to right) is an exergonic reaction.a. Trueb. False25. Which lower case letter labels the energy of activation in the presence of an enzyme?26. Which lower case letter labels the free energy that is released from the reaction?27. In the presence of the enzyme, the reaction occurs morea. rapidlyb. slowly28. Which of the following upper case letters designates the products of this chemical reaction?a. A + Bb. C + D29. Which of the following compounds is a metabolite that is produced within the