Triclosan is a broad-spectrum antibacterial agent used in many household products. It is structurally similar to polychlorobiphenylol, a substrate that binds to the active site of the enzyme sulfotransferase
Based on these facts, you can conclude that triclosan most likely
A) acts as a noncompetitive inhibitor.
B) functions as an enzyme when sulfotransferase is absent.
C) is a competitive inhibitor.
D) lowers the activation energy of chemical reactions.
C
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Meerkats are small desert mammals that live in groups of 20–50 animals. You observe the behavior of a group of meerkats. Which of the following behaviors would you categorize as examples of reciprocal altruism?
A. Two meerkats take turns grooming each other, each spending about the same amount of time grooming the other. B. One meerkat grooms a second meerkat, who is sleeping. C. One meerkat spends time standing upright on a stump, looking around, while other meerkats forage for food. D. One meerkat spends time sleeping in the burrow after eating, while other meerkats forage for food. E. One meerkat stands in the sun, while the other spends time digging out the burrow.
The laws related to sperm donation and surrogacy are the same in each state in the US
a. True b. False Indicate whether the statement is true or false
In a lipid bilayer, the _____ of all the lipid molecules are sandwiched between all the _____
a. hydrophilic tails; hydrophobic heads b. hydrophilic heads; hydrophilic tails c. hydrophobic tails; hydrophilic heads d. hydrophobic heads; hydrophilic tails
The amount of observable variation due to the environment can be measured by comparing the
number, frequency and kinds of alleles in both parents and offspring. _________ Indicate whether the statement is true or false.