Sterilization involves ________ all viable microorganisms.
A. metabolically inactivating
B. killing OR removing
C. removing
D. killing
Answer: B
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Which of the following is TRUE of a chemical reaction?
A. It requires no energy. B. It rarely occurs with a catalyst present. C. It changes a substance from one form to another. D. It is limited to only a few types of organisms. E. They are usually irreversible.
The knot of capillaries in a nephron where blood is filtered is called the _______
Fill in the blank(s) with correct word
Although pyruvate is the end product of glycolysis and no more ATP is generated by fermentation of pyruvate to ethanol, yeast produce ethanol under anaerobic conditions because
A) pyruvate export requires more energy than ethanol export. B) electrons (and protons) are then added to ethanol to make lactate. C) transfer of electrons from NADH to pyruvate to make ethanol regenerates NAD+, which is necessary for new rounds of glycolysis to proceed. D) glycolysis substrate-level phosphorylation changes pyruvate to ethanol. E) pyruvate to ethanol fermentation decreases deleterious CO2 levels.
Toxicants that cause harm by triggering over activation of the immune system are called ___.
a. neurotoxins b. teratogens c. allergens d. antibiotics