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What are some proximate and ultimate explanations for the jerking behavior of guppies after copulating?
A repeating polymer with the sequence 5'- GUAGUAGUAGUA...-3' was found to produce only two types of polypeptides in a translation system that uses cellular componants but not living cells. Onle polypeptide consisted of repeating Val and the other ..
Why do you think it is necessary to use a thermostable form of DNA polymerase (e.g. Taq polymerase) used in PCR? Is it necessary to use a thermostable form of DNA polymerase in the techniques of dideoxy DNA sequencing or site-directed mutagenesis?
A DNA polymerase made an error during the replication of an important gene region of DNA. None of the DNA repair enzymes detected or repaired the damage.
Consider a culture into which two E. coli strains are inoculated. Strain A is normal with g=21 min at 37 degrees C, and 42 mins at 27 degrees C. Strain B has a temperature-sensitive mutation, such that g=55 mins at 37 degrees C, and 39 mins at 27 ..
If a cell were treated with an inhibitor that would cause microtubules to fall apart, which of the following would NOT be affected?
When the widely prescribed painkiller Demerol is added to a suspension of respiring mitochondria, the ratios of NADH/NAD+ and Q/QH2 increase. Which electron-transport complex is inhibited by Demerol?
what are three parts Cell respiration has. Where in the cell is each found, the molecule(s) that enter each, the molecules at the end of each, and the number of ATPs harvested from each.
A 35-year old mentally retarded man died. His brain showed atrophy of the gyri and histologic features indistinguishable from those of Alzheimer disease. He had a chromosomal abnormality (trisomy 21). What was the most likely diagnosis?
Describe the experiments of Nirenberg and Benzer that helped determine the genetic code, different approach needed to determine the "stop" codons
What are the consequences of excess dietary intake ofprotein? What is a vitamin? Describe three generalfunctions of vitamins and give an example of each. Describe the effects of three vitamins that somepersons take in large amounts. (Hint: one water ..
q. give plenty space to draw upon and leave a white margin around the actual design so it can be seen clearly. as well
In the year following the fires, wildflowers sprouted in all burned areas, closely followed in subsequent years by seedlings of the trees that normally grow in the area, such as aspens and lodge poles pines. What changes in the Ecosystem will take pl..
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