What would happen to a cell if all of its peroxisomes were to suddenly rupture?
a. the cell would be unharmed
b. the cell would stop performing cleanup and recycling of debris
c. the cell would undergo uncontrollable, random chemical reactions
d. the cell would stop making proteins
Answer: c. the cell would undergo uncontrollable, random chemical reactions
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The refractory period of a neuronal plasma membrane is important because it ____
a. establishes the resting potential b. initiates an action potential c. ensures that the threshold potential will be reached d. ensures that an impulse will travel in a one-way direction e. resets the threshold potential
Cytokinesis typically begins during the ________ stage of mitosis
A) telophase B) prophase C) metaphase D) anaphase
Answer the following questions true (T) or false (F)
1. Most digested food is absorbed into the blood by the villi of the small intestine. 2. Sodium is a nutrient because it provides us with energy. 3. Minerals are always chemical elements, not compounds.
Which of the following statements regarding the demonstration of the etiology of disease is FALSE?
A. The suspect agent must be present in all cases of the disease. B. The suspect agent must cause the disease under investigation when introduced into a susceptible host organism. C. The suspect agent must be isolated and cultured in the laboratory. D. It must be possible to re-isolate the suspect agent from the infected experimental host. E. The suspect agent must be the only potential pathogen present in disease cases.