Which term describes the presence of abnormally high concentrations of protein in the urine?
Answer: hyperproteinuria
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A current problem in modern medicine is the development of drug resistance mutations. This occurs when a mutation arises in a disease-causing microbe making it resistant to a drug and thus rendering the drug useless in treating a specific disease. Many useful drugs are competitive inhibitors of specific enzymes, and the drug-resistance mutations prevent the binding of the drug. These types of mutations, in addition to preventing competitive inhibitor binding, can also sometimes reduce the activity of the enzyme. Why is that the case?
A. Binding to the competitive inhibitor is essential for the function of the enzyme B. These mutations most likely affect an allosteric site on the enzyme C. These mutations lower the activation energy of the reaction catalyzed by the enzyme D. These mutations most likely change the shape of the active site of the enzyme Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about enzymes and how their activity is regulated? How does this drug affect enzyme activity under normal circumstances? What other information is related to the question? Choose Answer Do you have all necessary information to analyze how drug resistance would reduce enzyme activity? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
It appears that eukaryotic diversity took off around 800 million years ago. Which of the following is thought to be responsible for this?
A. By 800 million years ago, enough time had passed since the arrival of eukaryotes for evolutionary adaptation to take place. B. Eukaryotic organisms first arrived 800 million years ago, so when they did, they quickly diversified. C. Chloroplasts first arrived 800 million years ago. D. Environmental conditions changed 800 million years ago, namely an increase in oxygen and a decrease in sulfide. E. All of the answer options are correct.
How can an individual whose parents did not have the "fish odor syndrome" trait inherit that trait?
a. If each parent were a silent carrier of the "fish odor syndrome," then their offspring would have a 25% chance of having the syndrome. b. The "fish odor syndrome" trait is inherited extra-genetically. c. If each parent were a silent carrier of the "fish odor syndrome," then their offspring would have a 100% chance of having the syndrome. d. If each parent were a silent carrier of the "fish odor syndrome," then their offspring would have a 50% chance of having the syndrome. e. Under the circumstances outlined above, the "fish odor syndrome" cannot be inherited.
In prokaryotes what is the cellular location of the electron transport chain and ATP synthase complexes?
A) Plasma membrane. B) Cytosol. C) Inner mitochondrial membrane. D) Endoplasmic reticulum. E) Ribosome.