49. Pyruvate is to glycolysis what is to a) NAD+ Krebs cycle. b) CO2 c) FAD d) O

Question

49. Pyruvate is to glycolysis what is to a) NAD+ Krebs cycle. b) CO2 c) FAD d) Oxygen electron transport chain. e) Co2 Electron transport chain. : Krebs cycle :Pyruvate oxidation 50. Which of the following statements about nucleotides is true? a) The nitrogenous base in a nucleotide is connected to the 3' carbon of the sugar. A phosphate group is connected to both the 5' and the 3' carbon of the sugar in a single nucleoside triphosphate. b) c) The sugar and phosphate portion of the nucleotide often form hydrogen bonds d) The ribose of an RNA nucleotide differs from the deoxyribose of a DNA e) None of the above with the bases of other nucleotides in its complementary strand. nucleotide by a single oxygen atom and a single hydrogen atom 51. Which of the following could help an organism that lives in extreme cold maintain its membrane fluidity? Increasing the number of saturated phospholipids in the plasma membrane. Increasing the length of the fatty acid tails of the phospholipids in the plasma membrane. a) b) c) Swapping of its saturated phospholipids for phospholipids that have trans double d) Decreasing the number of carbons in the fatty acid tails of the phospholipids in e) None of the above bonds in their fatty acid tails. the plasma membrane 52. Which of the following statements about electrons is true? Electrons picked up by oxygen at the end of the e.t.c. in mitochondria are at a a) b) Electrons picked up by oxygen at the end of the e.t.c. in mitochondria are at a c) Electrons must be fully stripped away from atoms (molecules) in order for the d) Electrons gain energy as they are passed along the e.t.c;that energy is used to e) None of the above higher energy level than those dropped off by NADH to the e.t.c higher energy level than those dropped off by FADH2 to the e.t.c atoms to be considered "oxidized" pump protons across the inner convoluted membrane. 15

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49. Pyruvate is to glycolysis what……………..is to………

Answer: Option A. NAD+      : kreb cycle

50.Which of the following statements about nucleotides is true?

Answer: Option B, C and D

51. Which of the following could help an organism that lives in extreme cold maintain its membrane fluidity

Answer: Option D. None of the above

52. Which of the following statements about electrons is true

Answer: Option A, B and C is true about electrons.

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