What type of molecules, embedded in phospholipid bilayers, transport hydrophilic molecules into or out of the cell?

A) carbohydrates
B) proteins
C) nucleic acids
D) lipids


B

Biology & Microbiology

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What is production efficiency?

A. The rate of photosynthetic fixation as a function of temperature. B. The percentage of energy assimilated by an organism that becomes new biomass. C. The amount of energy used by organisms at every node of a food web. D. Consumption of primary production by the second and third levels of a food web. E. The net gain to an ecosystem based on photosynthetic production.

Biology & Microbiology

In which of the following diseases does the spleen enlarge?

A. infectious mononucleosis B. malaria C. leishmaniasis D. brucellosis E. All of the choices are correct.

Biology & Microbiology

Which of the following food chains will allow the most energy to be available for human use?

a. corn ? cow ?humans b. corn ?humans c. algae?minnows?fish?humans d. alfalfa?cow?milk?humans e. corn?hen?eggs?humans

Biology & Microbiology

Which parasite is carried by Cyclops, an arthropod commonly found in still water?

A. Taenia saginata B. Schistosoma mansoni C. Dracunculus medinesis D. Fasciola hepatica E. Toxoplasma gondii

Biology & Microbiology