Final-key2007 - CH369 Final Exam Spring 2007 1. Glucose is...

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CH369 Final Exam – Spring 2007 1. Glucose is broken down in active muscle cells. It is produced again through gluconeogenesis in the liver. What intermediate metabolite is transported through the blood from the muscle cells to the liver cells? a. pyruvate b. acetyl CoA c. lactate d. oxaloacetate e. α -ketoglutarate 2. What is the difference between the enzymes hexokinase and glucokinase? a. They function in different metabolic pathways. b. They phosphorylate different intermediates. c. They function in different cell types. d. They function in different organelles. Credit was given for both. e. They exhibit different kinetics. 3. Phosphorylation of glycogen phosphorylase directly results in the a. activation of glycogenolysis. b. inhibition of glycogenolysis. c. activations of glycogen synthesis. d. inhibition of glycogen synthesis. e. phosphorylation of glycogen synthase. 4. The process of RNA being converted to DNA is a. replication. b. translation. c. reverse translation. d. transcription. e. reverse transcription. 5. Thymine differs from uracil and cytisine by a. how many hydrogen bonds it can form with its complimentary base pair. b. its general location of attachment to the ribose sugar. c. the addition of a methyl group. d. the addition of an amine group. e. the addition of a carbonyl group.
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6. What would be the adverse effect on DNA replication if a cell lacked proper telomerase function? a. Okazaki fragments would not be connected together. b. DNA strands would shorten with each round of replication. c. RNA primers would not be degraded in the newly synthesized DNA strands. d. The two strands of template DNA would keep joining back together before replication could occur. e. RNA primers would not be formed. 7. Semi-conservative replication means that a. DNA is copied by an evolutionarily conserved mechanism to ensure that few mutations occur. b. the newly made double helix consists of two new DNA strands, while the parental DNA retains the two original strands. c. the two resulting DNA copies each contain one strand of parental DNA and one newly constructed strand. d. the copied DNA is almost identical to the original DNA. e. DNA replication is done in such a way to conserve as much energy as possible. 8. The anti-parallel nature of double-stranded DNA means that a. the free 5’ hydroxyl groups will be on one end of the double-stranded molecule and the 3’ hydroxyl groups will be at the other end. b. the 5’ ends of the two strands are on opposite ends of the DNA molecule. c. the two strands twist around each other in a helical pattern. d. A and B e. B and C 9. The lagging strand a. is synthesized as one continuous strand, making it lag behind the other strand, which is made in many pieces at once. b.
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This note was uploaded on 02/16/2010 for the course CH 369 taught by Professor Kbrowning during the Spring '07 term at University of Texas at Austin.

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Final-key2007 - CH369 Final Exam Spring 2007 1. Glucose is...

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