Biology, 18.02.2021 04:30, alyssagibson470
In addition to extremes in temperature and pH, other chemical and physical agents denature proteins. These agents include ionizing radiation, alcohol, enzymes, and heavy-metal ions. For example, the first antimicrobial drug, arsphenamine, contained the heavy metal arsenic and was used to inhibit the enzymes of the bacterium Treponema pallidum, the causative agent of syphilis. Given that both human and bacterial enzymes are denatured by heavy metals, how was arsphenamine used to treat syphilis without poisoning the patient? Why is syphilis no longer treated with arsenic-containing compounds?
Answers: 2
Biology, 21.06.2019 15:00, loganyos
Disinfection of impression materials is usually accomplished by a. sterilization with high heat. b. spray or immersion in a chemical disinfectant. c. sterilization with steam under pressure. d. allowing the impression to sit 24 hours in water until all the organisms die.
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Biology, 21.06.2019 15:00, wileycheyennem
The images show fossils of a modern bird and two extinct organisms (a tyrannosaurus rex and an archaeopteryx). based on the structure of the three organisms, it can be concluded that . the archaeopteryx and bird have wings, while dinosaurs have limbs. so, it can be concluded that .
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Biology, 21.06.2019 16:30, lllleklfkhlsdf1201
As , plants meet their needs for making food from air, soil, water, and the sun's energy in a process called there are plants called grow high in trees without here are words to put in the blanks. 1.) producers 2.) consumers 3.) chloroplasts 4.) epiphytes
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Biology, 21.06.2019 22:30, brandyleemom3
How can you approximate the number of calories required to keep you in energy balance?
Answers: 2
In addition to extremes in temperature and pH, other chemical and physical agents denature proteins....
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