How many transmembrane domains are present in a G-protein-coupled receptor?
a. one
b. three
c. five
d. seven
e. nine
ANSWER: d
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One of the fish in your aquarium dies. Adding which protist to the water would allow you to avoid flushing the dead fish by speeding its decay?
A) an apicomplexan B) a dinoflagellata C) an oomycete D) a ciliate E) a euglenid
Which of the following is NOT a condition of
genetic equilibrium in a population?
a. no mutations in the population b. the population is small c. the population is isolated d. mating is random e. all of these ARE conditions of genetic equilibrium in a population
Which of the following regarding all of the tapeworms that infect humans is TRUE?
A. They all have non-human intermediate hosts. B. The larva can directly infect humans upon contact with skin. C. Humans are the normal intermediate hosts. D. They are transmitted by insect vectors. E. They reside in the muscle tissue of the definitive host.
Which of the following is the most unique aspect of archaeon cell envelopes?
A. The cell walls contain a modified type of peptidoglycan. B. The plasma membrane is composed of phospholipids. C. Archaeon capsules can be composed of protein or polysaccharide. D. Some archaeons have lipid monolayers in their plasma membrane.