Rigor mortis results from ___ after death.
A. the degeneration of muscles
B. The presents of acetylcholine in the neuromuscular junction of the muscle cells
C. the absence of carbon dioxide
D. Lack of calcium in the muscles
E. Lack of ATP in muscles
Answer: E. Lack of ATP in muscles
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Which is an example of potential rather than kinetic energy?
a. an apple made up of energy-rich macromolecules b. a firefly using light flashes to attract a mate c. a skier at the bottom of a hill d. a candle giving off light
Which of the following metabolic processes directly utilizes oxygen?
A) Alcohol fermentation B) Glycolysis C) ETC D) Lactic acid fermentation
Which of the following provides some evidence that RNA probably evolved before DNA?
A. DNA polymerase has proofreading function. B. RNA polymerase makes a single-stranded molecule. C. RNA polymerase uses DNA as a template. D. RNA polymerase does not require localized unwinding of the DNA. E. DNA polymerase uses primer, usually made of RNA.
Evolution is a process which is moving towards a defined goal.
a. true b. false