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Describe why biodegradation is an important process in natural ecosystems.
Describe one way in which humans have used their knowledge of natural biodegradation processes to reduce waste or clean up environmental damage.
What is Short Tandum Repeat (STR) and why do we now use that for DNA profiling instead of RFLP? Why is STR more effective and more sensitive?
Both excitatory and inhibitory neuron form junctions with muscles. By what mechanism do inhibitory neurotransmitters prevent the postsynaptic cell from firing an action potential?
Why do mutations that inactivate the 3'-5' exonuclease activity of DNA polymerase III greatly increase the frequency of mutations? What would be the effect of a mutation that inactivated the 5'-3' exonuclease activity of DNA polymerase I?
A chemical called DTA has a high affinity for Ca++ ions. Explain why using EDTA makes it easier to dissociate plant cells in a tissue.
Describe the contributions of the following eukaryotic microbes to the biofuels industry.
A runner has depleted all the oxygen available for muscle energy. Which of the following will facilitate his continued muscle performance?
What are some foods whose production depends upon lactic acid oralcoholic fermentation? determine which organisms areresponsible, which pathway they are using, and (specifically) what product of fermentation is responsible for the effect on the fo..
Two Hfr strains are isolated from a prototrophic coli strain. Both Hfr strains are mated with a Str(r) F- E. coli strain that is mutant for all the genes listed.
The genotype of F1 individuals in a tetrahybrid cross is AaBbCcDd. Assume independent assortment of these four genes, what are the probabilities that F2 offspring will have the following genotypes.
question 1.which cells produce hydrochloric acid in the stomach? where are these cells located?question 2.what enzyme
Define frequency-dependent selection. Can it result in the stable coexistence of two or more alleles at the same locus over several generations ? If you answered yes, give an example and explain how the equilibrium is maintained; if you answered n..
Chromatography have a limited protein binding capacity. During the Ni+2 Agarose Column lab, you noticed that wash 2 (W2) fluoresced slightly.
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