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1. The structure of biological membranes is determined primarily by the lipid bilayer but the specific functions of these membranes are carried out by proteins associated with the membrane. State whether you believe this statement is true or false and explain your answer?
2. You are working on a farm and come across a worker who has been exposed to high levels of an insecticide containing an organophosphate. Organophosphates are known to interfere with acetylcholinesterase activity. Acetylcholinesterase is an enzyme that degrades acetylcholine in the neuromuscular junction. What will happen to the muscles that are affected by the organophosphate and explain why this happens?
3. While on a camping trip you and a friend run into a bear. Your friend begins to hyperventilate. You give him a paper bag and tell him to breath into it. Why does breathing into a paper bag help your friend return to normal and what would be the physiological changes in his body if they did not receive the first aid treatment?
4. The body’s oxidation of glucose is commonly described as the burning of fuel. Is this analogy correct? Why or why not?
5. A 30 year old male patient with emphazema goes to the hospital and is prescribed a urinalysis. When the urinalysis test results are returned the patient’s urine has a low pH. How could the patient’s emphazema cause this test result?
6. You grow a human cell line in an isotonic solution and you look at it under a microscope and notice that it looks relatively round and normal. You then transfer the cell into a solution containing a high amount of salt. You then look under the microscope again and notice that the shape of the cell has changed. What shape do you see under the microscope and why has the cell changed to this shape.
If repressor tetramer uses only two of its subunits to bind to an operator sequence, why is tetramer formation so important to the control of lac operon gene expression.
Explain how tail length is inherited. Indicate how many gene pairs are at work and designate the genotypes of the two parents and lf the F1 offspring.
In humans, mitosis generates new cells for the growth and although mutations are the ultimate source of the genetic variability.
Non-competitive inhibitors of enzymes change the slope and Km of the Lineweaver Burk graph compared to no inhibitor.
Import or export of solutes (chemiosmotic work) turning the flagellar motor (mechanical work) Synthesizing ATP via the F0F1 ATPase (chemical work; discussed next lecture) how is this energy generated or replenished.
Having learned an optimum sugar concentration, students next decide to investigate whether different strands of yeast ferment glucose to produce different amounts of alcohol. In brief explain how this experiment would be set up.
Show the lines of current flow to unexcited parts of the cable. Elucidate how these local currents cause the action potential to propagate. A common mistake is to confuse the currents that flow throughout the action potential the voltage-clamp curren..
How to comprise the genotypes of both parents. The pronghorn of the United States and the saiga antelope of the central Asian steppes live in similar habitats and have alike adaptations. Which of the features would you be surprised to discover in a s..
The F1 generation, which resulted from cross between the two lines, has a mean of 135kg and a variance of 16kg. What is the broad sense heritability (H2) for milk yield in this population.
A number of major worldwide industries are based on anaerobic respiration in a lower form of organism.define how anaerobic respiration plays a part.
A certain gene consists of 450 nucleotide pairs.How various codons make the 150 residues.
The bacteria are allowed to grow overnight and are streaked on a plate using the technique that produces isolated colonies that are clones of the original. Samples of these colonies are then grown in four different media: nutrient broth plus ampicill..
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