Which of the following statements describes the correct flow of energy conversions through living systems?
A. Chloroplasts produce carbon dioxide and water during photosynthesis, which in turn is used by mitochondria to generate ATP molecules.
B. Mitochondria convert solar energy into the chemical energy of nutrient molecules such as glucose. Chloroplasts then burn glucose into ATP molecules during cellular respiration.
C. Chloroplasts generate chemical energy in the form of ATP molecules and mitochondria convert ATP molecules into glucose to be used for work.
D. Chloroplasts convert solar energy to the chemical energy of nutrient molecules and mitochondria convert this chemical energy into ATP molecules used for work.
E. Mitochondria capture solar energy and convert it to oxygen. Oxygen is used by chloroplasts to generate ATP molecules.
Answer: D
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Optical density and viable cell concentration are LEAST proportional to each other during
A) lag phase. B) exponential growth phase. C) stationary phase. D) death phase.
The final electron acceptor of the electron transport chain is:
A. oxygen. B. coenzyme Q. C. NAD+. D. ATP synthase. E. cytochrome C.
The linear DNA fragments taken up from disrupted infective cells recombine with the chromosomal
DNA of the noninfective cells by ____, much in the same way as genetic recombination takes place in conjugation.
a. meiosis b. metaphase II c. nuclear division d. double crossovers e. transformation
What is the function of the Okazaki fragments?
a. stabilizing the helix b. DNA proofreading c. elongation of the lagging strand d. sealing the gaps left behind during polymerization