A carrier is a person who
a. carries a recessive gene for a genetic disorder but shows no signs or symptoms.
b. shows signs and symptoms of a genetic disorder only under conditions of stress or other
illness.
c. carries a gene for a genetic disorder and shows signs and symptoms most of the time.
d. carries a gene for a genetic disorder and shows signs and symptoms all of the time.
e. carries a gene for a genetic disorder and shows a reduced degree of signs and symptoms.
A
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During photosynthesis in plants and algae, __________ is oxidized and __________ is reduced
A. O2; CO2 B. CO2; H2O C. H2O; O2 D. H2O; CO2 E. NADPH; ATP
We study cellular respiration because it is one of the most important pathways in biology. In fact, nearly all
carbohydrates at some point in their catabolism are directed through cellular respiration. Why is it unnecessary to have multiple independent pathways to break down different molecules?
a. Using cellular respiration is theoretically the most efficient way to break down sugars and other molecules. b. Oxygen must be used in the breakdown of all molecules in order to yield ATP. c. Greater complexity would lead to an eventual failure of the biological system. d. Most biological cells only catabolize one or two different types of sugars and only need one main pathway. e. Energy-containing macromolecules can be converted to products that can enter at various points in the cellular respiration pathway.
Why are human behaviors so difficult so study? What will be an ideal response?
Which of the following statements does NOT agree with the cell theory?
A) Spontaneous generation of cells cannot occur. B) The smallest living organisms are single cells. C) Paramecium comes from Paramecium. D) Insects are composed of cells. E) A balanced diet is important for good health.