311C F07 Exam3+A

311C F07 Exam3+A - Name_KEY Bio 311C Exam 3A Multiple...

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Name _______ KEY _____ Bio 311C Exam 3A Multiple Choice. (2 points each) Choose the best response for each of the following. Record your answer on the scantron provided. A B C D 1 B C E E 2 A B D A 3 E B B C 4 C B A B 5 B B D D 6 D E C C 7 B A B A 8 A C C A 9 C B A E 10 A C E A 11 C D B C 12 D A B D 13 C B B B 14 A D B C 15 E E C B 1. Overall, transcription is very similar in prokaryotes and eukaryotes. However, one important distinction is that prokaryotes do not require: transcription factors. 2. Most atmospheric oxygen occurs as a result of photosynthesis. From which molecule is the oxygen derived? water 3. Which of the following occurs when T2 bacteriophages are grown in a medium containing radioactive phosphorus ( 32 P)? Their DNA becomes radioactive. 4. The function of both alcohol fermentation and lactic acid fermentation is to oxidize NADH to NAD + . 5. How is the problem of the shortening of the length of the DNA molecule resolved with each round of DNA replication? This is not a problem because of teleomeres. 6. What is the primary function of the light reactions of photosynthesis? Produce ATP and NADPH. 7. Which of the following are transcribed and translated? exons 8. The main goal of cellular respiration is to produce ATP. 9. Which of the following best describes the structure of a nucleoside triphosphate that might next be added to a growing polynucleotide? A deoxyribose sugar covalently bound to thymine and three phosphate groups. 10. Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate, an early step of glycolysis. In the presence of oxygen, an increase in the amount ATP in a cell would be expected to inhibit the enzyme and thus slow the rates of glycolysis and the citric acid cycle. 11. What kind of observation would you make if an actively dividing E. coli culture is grown in a medium containing radioactive
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thymine and allowed to replicate once? DNA in both daughter cells would be radioactive. 12. Which of the following statements describes the primary function of the Calvin cycle in green plants? Synthesize simple sugars from carbon dioxide. 13. According to Chargaff’s analysis of the nucleotide composition of DNA, which of the following is true ? %A + %C = %G + %T 14. A gene that is 8,000 nucleotides long is used to make a protein consisting of 400 amino acids. This is best explained by the fact that many noncoding nucleotides are present in the mRNA. 15. As a ribosome translocates along an mRNA molecule by one codon, which of the following occurs?
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This note was uploaded on 03/23/2010 for the course CH 54410 taught by Professor Sessler during the Spring '10 term at University of Texas.

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311C F07 Exam3+A - Name_KEY Bio 311C Exam 3A Multiple...

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