Exam 2 BIOL2482 SECTION 1: Multiple answer questions Instructions:The following

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Exam 2 BIOL2482 SECTION 1: Multiple answer questions Instructions:The following questions each have between 1 and 3 correct responses. You must indicate all correct responses to receive full credit. Wrong answers will result in a reduction in points from your total. Marking all responses will result is a score of zero for the question. Scores cannot be lower than zero for each question. Each question is worth 3 points. The following pertains to questions 1-3. You are exa isolated from pond sediments outside of Research Building. The large decayed plant matter, multi-celled organisms, and other debris have been removed. All you have left in the sample are mining an environmental sample you have The sample has been sitting without agitation for two days in the lab, so when you measure O2 levels in the water they are very low. You add glucose to the sample and measure increased levels of lactic acid after 2 hours. Based on these data, which of the following statements are true? 1. A, There are predominantly lactic acid fermenting prokaryotes in the sample. B. Only prokaryotes capable of respiration are in the sample. C. There are predominantly mixed acid fermenting prokaryotes in the sample. D. The organisms in the sample are using glycolysis. E. The organisms in the sample are using -oxidation. 2. Ammonium nitrate (NH,NO,) is a common nitrogen fertilizer, and might be used in landscaping around the pond. You add this to the sample in Question 1 and observe the lactic acid is rapidly consumed, and CO2 and N2 are produced. Based on these data, which of the of following statements are true? A. Some organisms are capable of respiration. B. The CO2 produced is likely a byproduct of organisms using the citric acid cycle. C. Some of the prokaryotes can use ammonia (NH.) as a terminal electron acceptor D. Some of the prokaryotes can use nitrate (NO3) as a terminal electron acceptor. E. Some of the prokaryotes can convert nitrate (NO) to N2 and and are using O2 as their terminal electron acceptor

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2.

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