Wednesday
July 30, 2014

Homework Help: ap biology again

Posted by claudia on Friday, January 4, 2008 at 5:50pm.

In order to answer a question I must use this information but I find it very confusing.
The restriction enzymes of bacteria protect the bacteria from succesful attack by bacteriophages, whose genomes can be degraded by the restriction enzymes. The bacterial genomes are not vulnerable to these restriction enzymes because bacterial DNA is methylated. This situation selects for bacteriophages whose genomes are also methylated. As new strains of resistant bacteriophages become more prevalent, this in turn selects for bacteria whose genomes are not methylated and whose restriction enzymes instead degrade methylated DNA.
What I find confusing is that it is first saying that the restriction enzymes do not affect the bacteria because its genome is methylated and that the ensymes protect the bacteria well against the bacteriophage by degrading its genome but then it says that the bacteriophage's genome is also methylated so I feel it is a bit confusing. If you are able to help thank you in advance.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - In a lab experiment, the count of a bacteria doubles every hour. a)at 1pm...
tofu - does tofu have any naturally occuring bacteria in it? When I incubated ...
Science - A vaccine can protect you against a disease because it (1)destroys ...
precalculus - A bacteria culture initially contains 1500 bacteria and doubles ...
bio - I did a DNA fingerprinting lab and I can't understand some of the ...
Biology - In detail can someone please explain to me how cooking eggs makes them...
genetics/biology - Bacteria Y has a mutation within itís genome, at gene R, that...
genetics/biology - Bacteria Y has a mutation within itís genome, at gene R, that...
MATH :) - 3. In Biology, it is found that the bacteria in a certain culture ...
Chem - suppose that you place exactly 100 bacteria into a flask containing ...

Search
Members