lunes, 26 de julio de 2010

QUESTION PROBLEM TOPIC 1










a)Deduce the type of genetic material used  by:
·      Cattle
·      E.coli
·      Influenza viruses
b)Suggest a reason for the difference between Cattle thymus gland, Spleen and sperm in the measurements of their base composition.
c) -Explain the reasons for the total amount of adenine plus guanine being close to 50% in the genetic material of many of the species in the table.
-Identify two other trends in the base composition of the species that have 50% adenine and guanine.
d) -Identify a species shown in the table that does not follow the trends in base composition described in C)
-Explain the reasons for the base composition of this species being different.


Answers:


a)-Cattle: The type of material genetic by the cattle is used is DNA because it isn't using Uracil.
-E. Coli: The type of genetic material used by the E.Coli is DNA because it isn't using uracil it is using Thymine.
-Influenza Viruses: The type of the genetic material used by the influenza Viruses is RNA because it isn't using thymine it is using uracil.
b)We have different body parts in this case talking about the cattle parts, in the table apears different parts, maybe in the table are diffent kind of cattle that is the principal reason I think, or maybe there is somebody trying to do a test with that animal.
c)-In most of the situations in the table we have percentages close to 50 % sometimes more, sometimes less and sometimes the same thing. In DNA the adenine goes with the thymine, and the guanine with the cytosine, so a base might be adenine or guanine, so operating those bases the answer might be close to 50%.
-The answer is the wheat and the yeast.
yeast:31.3+18.7=50%
Wheat:27.3+ 22.7=50%
d)-The cattle thymus gland, The cattle sleen, the cattle sperm, the pig thymus gland, the salmon, E.coli, the human sperm and finally the influenza virus.
-Because it depends on the animal, the enviroment and that staff, so all species are different and the influenza is a virus so it use RNA.

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