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Living cells are highly ordered units, yet the universe is heading toward higher entropy. Discuss how life can maintain its order in spite of the second law of thermodynamics. Are we defying this law? Part 2: What is the advantage of using ATP as a common energy source? Another way of asking this question is, Why is ATP an advantage over using a bunch of different food molecules? For example, instead of just having a Na+/K+-ATPase in a cell, why not have a bunch of different ion pumps each driven by a different food molecule, like a Na+/K+-glucosase (a pump that uses glucose), a Na+/K+-sucrase (a pump that uses sucrose), a Na+/K+-fatty acidase (a pump that uses fatty acids), and so on?
What kinds of things need to get into and out of a typical cell? How are these activities accomplished? Are there any diseases or adverse conditions directly related to problems of transport across membranes?
Describe the sympathoadrenal system control of blood flow. Include the neurotransmitter and effect in the arterioles of the viscera, the neurotransmitter and effect in the arterioles of skeletal muscle, and the hormonal effect in the arterioles of..
You observe bacterial growth and acid production in a single tube of OF-glucose medium that is exposed to air. Without the benefit of a tube sealed with oil to use for comparison can you tell if the organism is oxidizing or fermentation?
Along with phenylpyruvic acid, ammonia is manufactured as a result of phenylalanine deamination. Could you think of a way in which the production of ammonia could be used as an indication of a postiive reaction?
The stomach contains enzymes that aid in digestion, including proteases which digest proteins. Why don't these enzymes digest the stomach and small intestine, which are partically composed of protien?
define conduction velocity.
The wombat is an animal with two possible coat colors, brown or silver. It has been hypothesized that coat color is an x-linked trait. Sex determination in wombats is via a mechanism that is identical to sex determination in humans.
Diagram and explain how two genes with different alleles (A/a and B/b) on different chromosomes go through the process of meiosis.
We did an experiment to find total protein concentration by using A260/280 and Bradford Assay Methods. Why was there a difference between the protein concentration recovered from both of these assays?
draw the structure of an RNA hairpin with a 10-bp stem and a 5n-t loop. make up a sequence that will form such a structure. show the sequence in the linear as well as the hairpin form.
A patient has a dead space of 150 mL, functional residual capacity of 3 L, tidal volume of 650 mL, expiratory reserve volume of 1.5 L, total lung capacity of 8 L.
what ways are the mechanisms of action similar. CA2+, IP3, and cAMP have all been described as second messengers.
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