Project #37150 - cell and mole bio

can ne1 help me wit a few Q's frm my hw? 

5.
List differences between bacteria and animal cells that could have depended on the appearance during evolution of some or all of the components of the present eukaryotic cytoskeleton. Explain why a cytoskeleton might have been crucial for these differences to evolve.

 

9.
DNA repair enzymes preferentially repair mismatched bases on the newly synthesized DNA strand, using the old DNA strand as a template.  

 

 

b.
Would such an indiscriminate mismatch repair be better than, worse than, or the same as no repair at all?  Explain your answers.
 
 
6.
The enzyme alcohol dehydrogenase (ADH) catalyzes the oxidation of alcohols to aldehydes. The liver isozyme (LADH) is responsible for converting ethanol (EtOH) to acetaldehyde. Methanol (wood alcohol), which is mildly intoxicating, is highly toxic if ingested because LADH converts it to formaldehyde.
a.
Describe the relationship between LADH, EtOH and methanol.
b.
What is the medical treatment for methanol poisoning?
c.
Explain how this treatment would decrease the toxicity of methanol.

Subject Science
Due By (Pacific Time) 08/04/2014 03:30 pm
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