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Q1. The stomach contains hydrochloric acid. Why is it essential for the stomach to be so acidic? How does the stomach protect itself from being digested?
Q2. Cyanide binds to complex IV of the electron transport system, preventing the reduction of oxygen to water. Explain the ultimate effects of cyanide on electron transport, oxygen consumption, and ATP production. How can these in turn affect a person?
Assume you have reconstituted into same membrane vesicles purified bacteriorhodopsin, which is light drive H+ pump from a photosynthetic bacterium, and purified ATP synthase from ox heart mitochondria.
explain how the terms "ancestral" and "derived" differ from the terms "gained" and "lost." How can you have a character that is lost, but is the derived state of that trait?
Very stable proteins can still degrade after adsorption on the surface as time increases. How would you examine this? What would you do to minimize degradation of a protein.
What is nondisjunction? In what type of reproductive cells in this most likely to happen? Name three chromosomal aberrations which can result fro this phenomenon.
Does antisense RNA prevent translation or transcription? Explain you answer and why do housekeeping genes have to be hypomethylated and hyperactylated?
Discuss the role of the cell cycle in a normal cell versus a cancer cell. Describe the role of the cell cycle in normal cell versus a cancer cell.
q1. a standard procedure in pufying tubulin is to extract tissue on ice then put in gtp and warm the tissue extract to
Explain the causes, symptoms, effects of the bulimia and anorexia. Describe the mechanism of their reversible effects. Determine the net change of the Gibbs free energy for a DNA machine.
How many distinct molecular mechanisms might be responsible for converting a proto-oncogene into a potent oncogene? What are they and how might they be responsible for the converting?
Explain what drives zonation in the marine environment. On what scales can zonation occur? Give examples.
In rats, a black-tailed mutant was discovered. When it was crossed to a pink long-tailed rat, 4 offspring were black-tailed and 3 were pink tailed. Two of these black-tailed rats were crossed and they produce 6 black tailed and 3 pink-tailed rats.
A mammal uses only 1 to 2 percent of its energy in ventilation while a fish must spend about 15 percent of its energy to move water over its gills. Describe this huge difference in their efforts to collect oxygen.
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