As body size increases in animals, _____
A) the surface-area-to-volume ratio decreases
B) reproduction becomes limited to terrestrial environments
C) there is greater variability in metabolic rate
D) migration to tropical areas becomes necessary for thermoregulation
E) it becomes more difficult to conserve body warmth in cold environments
Answer: A
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Which of the following statements regarding sepsis is incorrect?
A. A sample of blood plated on a variety of bacterial media is a good method to identify the causative organism in sepsis. B. Both gram-negative and gram-positive bacteria in the blood can induce sepsis. C. The presence of microbes in the blood results in increased viscosity, and a rise in blood pressure is a hallmark of sepsis. D. The Gram-negative cell envelope stimulates an inflammatory response that leads to endotoxic shock.
How do plasmids containing genes for antibiotic resistance get exchanged between different bacteria cells in a culture?
a. through artificial exchange b. through transduction c. through conjugation d. through cloning e. through conduction
A lot of energy is contained in each mole of glucose (686kcal), and if a cell were to release all that energy at once, the amount of heat produced would kill the cell. Which of the following statements is the most likely explanation for how a cell keeps itself from bursting into flames.
a) Glycolysis occurs in steps and each step does release heat, but not enough at one time to damage the cell. b) The cell has several protective organelles that absorb the excess energy released from the glucose and stores it in the form of fat cells, explaining why lots of sugar will make you gain weight. c) The cell extracts the energy from one mole of glucose all at once, but couples the reaction with an equally powerful endergonic reaction that uses up the excess energy. d) The cell extracts energy from one mole of glucose all at once, but the heat is used to maintain the cell's internal temperature. Why else would humans have such a warm body temperature? e) Both b) and d) are correct.
Which of the following is an accidental parasite of humans?
A) Ascaris lumbricoides B) Acanthamoeba C) Balantidium coli D) Entamoeba histolytica E) Plasmodium