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CH369 369finalS02 - 1 The dominant form of DNA found in the...

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1. The dominant form of DNA found in the cell is the B form of DNA. Which of the following characteristics is associated with the B form of DNA? a. the sugars are located in the interior of the double helix b. the distance between base pairs along the axis of the helix is 6.8 Ǻ c. the major and minor grooves are readily apparent d. the planes of the bases make about a 20 degree angle with the helix axis 2. The successive mononucleotide units in DNA and RNA are: a. linked by hydrogen bonding through phosphodiester bridges between the 3' position of one mononucleotide and the 5' position of the next b. linked by hydrogen bonding between adenine and thymine and between guanine and cytosine c. linked covalently through phosphodiester bridges between the 3' position of one mononucleotide and the 5' position of the next d. linked covalently between adenine and thymine and between guanine and cytosine e. linked by a glycosidic bond 3. The process of "transcription" in eukaryotes involves the synthesis of: 4. What is the property of the chain-terminating nucleotides used in DNA sequencing that enables them to terminate the polymerizing DNA chain? 5. Which of the following changes in cellular metabolite concentrations might indicate a need to speed up the net rate of glycolysis?
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6. Fatty acids are activated to acyl-CoAs and the acyl group is further transferred to carnitine because: a. acyl-CoAs easily cross the mitochondrial membrane, but the fatty acids will not. b. fatty acids cannot be oxidized by FAD unless they are in the acyl-carnitine form. c. carnitine is required to oxidize NAD+ to NADH. d. acyl-carnitines readily cross the mitochondrial inner membrane, but acyl-CoAs do not. e. none of the above 7. Which of the following statements about the light reactions in photosynthetic plants is false ?
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