exam02_key_2007 (1) - BTNY 210 Exam 2A KEY March 7, 2007...

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BTNY 210 Name________________ _KEY _________ Exam 2A KEY Lab Day and Time____________________ March 7, 2007 1. True or false. Auxin is produced in the apical meristems and moves in a polar fashion toward the base of the plant. 2. True or false. Auxin can cause immediate growth of a cell by binding to a protein in the plasma membrane and stimulating the excretion of protons into from the cell into the cell wall. 3. True or false . The growth of a plant toward the light is called thigmotropism. 4. True or false . A long-day-plant is one that flowers only during short days. 5. True or false. A short-day-plant can be induced to flower by interrupting a long night with a flash of light. 6. The hormone most responsible for causing a stem to grow upward is: a. auxin b. gibberellic acid c. abscisic acid d. ethylene e. cytokinin 7. The hormone responsible for fruit ripening is: a. auxin b. gibberellic acid c. abscisic acid d. ethylene e. cytokinin 8. The hormone most responsible for causing an enzyme to be produced in the aleurone layer of barley and other seeds, which in turn digests starch into glucose which can be used for growth and development of a seedling is: a. auxin b. gibberellic acid c. abscisic acid d. ethylene e. cytokinin
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BTNY 210, S07 Exam 2A 2 9. The name of the pigment that absorbs red light and allows the plant to respond to length of the day (differences between winter and summer) is: a. chlorophyll b. xanthophylls c. carotene d. phytochrome e. cryptochrome 10. Plant hormones can cause their effects by different mechanisms that include direct interaction with genes, direct interaction with plasma membrane proteins, or indirect effects involving one or two or three intermediates in the cell. The route a hormone or other stimulus uses to cause its eventual effect is called the: a. signal translation pathway b. signal transformation pathway c. signal transduction pathway
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This note was uploaded on 02/23/2012 for the course BTNY 210 taught by Professor Staff during the Spring '08 term at Purdue University-West Lafayette.

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exam02_key_2007 (1) - BTNY 210 Exam 2A KEY March 7, 2007...

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