Antiseptics are generally regulated by the ________.
A. Environmental Protection Agency
B. The National Institutes of Health
C. Centers for Disease Control and Prevention
D. Food and Drug Administration
Answer: D
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What marine biology laboratory inspired other facilities of the same kind?
a. Marine Biological Laboratory at Woods Hole b. Friday Harbor Laboratories of the University of Washington c. Museum of Comparative Zoology at Harvard University d. Scripps Institute of Oceanography in California
The structure where parts of ribosomes form before passing into the cytoplasm is the ____
a. nucleus b. nuclear membrane c. Golgi body d. nucleolus e. chromosome
Rubisco is an important enzyme in the Calvin cycle because it acts as a carboxylase to catalyze addition of carbon dioxide and water to ribulose-1,5-bisphosphate, which then forms two molecules of 3-phosphoglycerate
Rubisco also acts as an oxygenase to catalyze addition of molecular oxygen rather than carbon dioxide to ribulose-1,5-bisphosphate. a) What is (are) the product(s) of the rubisco oxygenase reaction activity and why is this a problem for plants? b) Explain why rubisco's much lower affinity for oxygen than for carbon dioxide does not mitigate the rubisco oxygenase problem for plants. c) Identify the pathway plants use to metabolize the problematic product of rubisco oxygenase and the final fate of its carbons. d) Explain why the oxygenase activity of rubisco is particularly problematic for plants in arid environments. e) What strategies do plants in arid environments use to deal with this problem? What will be an ideal response?
The catabolite repression system in E. coli essentially represses the lac operon when glucose is present. What evolutionary advantage would favor evolution of such a system?
What will be an ideal response?