Your mother worries because every time you drink milk, you have abdominal discomfort and bloating. You tell her not to worry. Explain your problem and how you can treat it
What will be an ideal response?
You have lactose intolerance. You can "treat" it by avoiding milk, or you can take lactase, the enzyme that breaks down lactose into monosaccharides.
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What is a cyclin?
A. a protein that activates kinases B. a protein whose levels change with the cell cycle C. a kinase D. Answers a and b are both correct.
Methanotrophs affect global temperature. This is because:
A. Methanotrophs use oxygen produced by plants to metabolize methane, thereby reducing the amount of methane in the atmosphere. Since methane is one of the greenhouse gases whose accumulation causes a rise in global temperature, its reduction by methanotrophs helps prevent global warming. B. Methanotrophs convert methane to carbon dioxide and increase the amount of carbon dioxide in the atmosphere. Since carbon dioxide is one of the greenhouse gases whose accumulation causes a rise in global temperature, its production by methanotrophs contributes to global warming. C. Methanotrophs convert carbon dioxide to methane and increase the amount of methane in the atmosphere. Since methane is one of the greenhouse gases whose accumulation causes a rise in global temperature, its production by methanotrophs contributes to global warming. D. Methanotrophs convert methane to carbon dioxide, thereby decreasing the amount of methane in the environment but increasing the amount of carbon dioxide there. Since both methane and carbon dioxide are greenhouse gases whose accumulation causes a rise in global temperature, the decrease in one cancels the increase in the other and methanotrophs have no net effect on global warming. E. Methanotrophs combine carbon dioxide and methane to form petroleum and in this way take both methane and carbon dioxide out of the atmosphere. Since both methane and carbon dioxide are greenhouse gases whose accumulation causes a rise in global temperature, the decrease in both helps prevent global warming.
. A simplified form of the Fick diffusion equation is J = DA (C1-C2) where J is the rate of diffusion, D is a constant, A is the area across which diffusion is occurring, and C1 and C2 are the concentrations of the substance on either side of the membrane. Given this, which of the following would INCREASE the rate of diffusion of a solute?
A. an increase in C1 while holding C2 constant B. an equivalent decrease in both C1 and C2 C. an equivalent increase in both C1 and C2 D. a decrease in D E. a decrease in A
The genetic condition xeroderma pigmentosum, which can lead to skin cancer, results from the inability to
A) correct UV-induced thymine dimers. B) process the amino acid phenylalanine. C) produce functional hemoglobin. D) correct transitions. E) correct breaks in the X chromosome.