midterm2008-1-practice

midterm2008-1-practice - MULTIPLE CHOICE. Choose the one...

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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Refer to Figure 9.2, showing the citric acid cycle, as a guide to answer the following questions. Figure 9.2 1) Starting with one molecule of isocitrate and ending with fumarate, what is the maximum number of ATP molecules that could be made through substrate-level phosphorylation? 1) _______ A) 2 B) 11 C) 1 D) 24 E) 12 2) According to the induced fit hypothesis of enzyme catalysis, which of the following is CORRECT? 2) _______ A) A competitive inhibitor can outcompete the substrate for the active site. B) The active site creates a microenvironment ideal for the reaction. C) The binding of the substrate changes the shape of the enzyme's active site. D) Some enzymes change their structure when activators bind to the enzyme. E) The binding of the substrate depends on the shape of the active site. 3) The reaction-center chlorophyll of photosystem I is known as P700 because 3) _______ A) there are 700 photosystem I components to each chloroplast. B) the plastoquinone reflects light with a wavelength of 700 nm. C) it absorbs 700 photons per microsecond. D) this pigment is best at absorbing light with a wavelength of 700 nm. E) there are 700 chlorophyll molecules in the center.
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Figure 10.1 4) What wavelength of light is most effective in driving photosynthesis? 4) _______ A) 420 mm B) 730 mm C) 475 mm D) 575 mm E) 625 mm 5) How many ATP molecules could be made through substrate-level phosphorylation plus oxidative phosphorylation (chemiosmosis) if you started with three molecules of succinyl CoA and ended with oxaloacetate? 5) _______ A) 12 B) 36 C) 18 D) 6 E) 24 6) Where does the Calvin cycle take place? 6) _______ A) stroma of the chloroplast B) outer membrane of the chloroplast C) cytoplasm surrounding the chloroplast D) chlorophyll molecule E) thylakoid membrane 7) Why is ATP an important molecule in metabolism? 7) _______ A) It provides energy coupling between exergonic and endergonic reactions. B) Its terminal phosphate group contains a strong covalent bond that when hydrolyzed releases free energy.
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This note was uploaded on 12/16/2009 for the course BIOLOGY 2112 taught by Professor Rappaport during the Fall '08 term at Temple.

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midterm2008-1-practice - MULTIPLE CHOICE. Choose the one...

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