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K+ leak channels are found in the plasma membrane. These channels open and close in an unregulated, random fashion. What do they accomplish in a resting cell?Answer:They set the K+ concentration gradient to zero.They set the membrane potential to zero.They disrupt the resting membrane potential.They keep the electrochemical gradient for K+ at zero.
Water molecules readily form hydrogen bonds with other polar molecules, and when they encounter nonpolar molecules they must form hydrogen-bonding networks with neighboring water molecules. Which of the following molecules will cause a "cage" of water to form?Answer:2-methylpropaneacetonemethanolurea
Where is the metabolic and regulatory function in a neuron and happens at? What is the most common type of neuron in the body?
What essential criteria must be met in order to execute a successful mapping cross? Recombination must occur in the sex that displays genetic heterogeneity.
Why would extensive secondary growth in stems of annual plants be a "poor investment" for the plant?
Will the yeast cells or the corn seedling have a higher metabolic rate when compared on a mass specific basis (in moles ATP / gram organism x hr)? [Here, it might be important to consider that we are actually comparing fully hydrated seeds to dry ..
Present two factors contributing to the solid waste problem in the U.S. How could these factors be changed or controlled for the better? What problems are there with current recycling efforts? What is being done in your area relative to recycling?
Arthropods are the most diverse group of animals. Describe some characteristics of arthropods that may have contributed to their great evolutionary success.
During protein translocation, why would inhibiting enzymes that add carbohydrates to glycosylation branches stop the movement of protein to the next step?
What mutagens can be used to revert mutants to wild type with a hydroxylamine mutation?
Why were the ratios the similar in the first part but different in Part 2.
How do glucose and amino acids cross the brush border?
Any organism that uses the Krebs cycle can use citrate and most organisms have the enzymes for the Krebs cycle. Why then do so many organisms test Citrate negative with the citrate test?
DNA and RNA are similar yet distinct components of the cell. Describe three differences between RNA and DNA with respect to their chemical composition and structure. Provide a detailed description of each characteristic you chose in your response.
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