Which of the following statements about obesity is false?
a. The number of fat cells in an adult is determined by the amount of fat stored during
childhood.
b. Genetics, not overeating, is responsible for obesity.
c. Obesity can result from an increase in the size and/or number of fat cells.
d. Many of the factors involved in obesity are inherited.
e. To lose weight, energy intake must be less than energy output.
B
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The end results of alcoholic fermentation are
a. ethanol and carbon dioxide. b. ethanol and oxygen. c. sugar and carbon dioxide. d. sugar and oxygen.
The alignment of homologous chromosomes with the exchange of genetic information between them is known as
A. random fertilization. B. lining up at the equator. C. independent assortment. D. crossing over.
What is meant by the "directionality" of the strands of a DNA molecule? Explain how this directionality is ultimately responsible for Okazaki fragments. What will be an ideal response?
A 5-year-old boy has bloody diarrhea for 2 days, nausea, abdominal cramps, and vomiting. He subsequently undergoes acute renal failure. Upon questioning the mother, it is learned that the diarrhea started 24 hours after the child had eaten a hamburger at a fast-food restaurant. Which of the following is the likely cause of this disease?
A. Bacillus cereus B. Vibrio cholerae C. Escherichia coli strain O157:H7 D. Staphylococcus aureus E. Salmonella typhi