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s344n2d4d5 [400]
4 years ago
6

You have a strain of bacteria that is defective for DNA glycosylase activity. You expose one culture of this strain to EMS and t

he other to cisplatin (a chemotherapy drug that creates bulky adducts on purine bases). You notice that the cisplatin is much more toxic to this mutant strain of bacteria than is the EMS. Explain your observation.
Biology
1 answer:
Scrat [10]4 years ago
4 0

Answer:

Bacteria under successive rounds of selection may acquire genetic resistance to the treatment with mutagenic compounds including ethyl methanesulfonate (EMS).  

Explanation:

Artificial selection is a process known to generate resistance of the organisms under treatment. For example, this type of selection has been reported to generate resistance to the treatment with different chemical compounds including mutagenic chemical compounds (in this case EMS), antibiotic drugs, etc.

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Summarize the nitrogen cycle and it’s importance of proteins and DNA
iren2701 [21]

Answer:

Nitrogen cycle works through various stages like, nitrogen fixation, nitrification, assimilation, ammonification, denitrification etc. It is a building block for protein and DNA

Explanation:

Nitrogen is an element abundantly found in the atmosphere, also its building block for proteins as well as nucleic acid i.e. DNA formation. In nitrogen cycle , the nitrogen is being prepared from inert nitrogen.  The nitrogen cycle has several processes like nitrogen fixation, in this the inert nitrogen is being converted to organic nitrogen with the help of certain micro-organism.

Nitrification, plants cannot absorb directly nitrogen so bacteria help the plants to convert the nitrogen into ammonia form in this stage. Assimilation, another stage in which plants starts absorbing various forms of nitrogen from the soil.i.e. nitrate, nitrite and ammonium. Ammonification, here plants and animals have nitrogen in there body after death various microbes help in decomposition in this stage. Denitrification, in this stage the return back of nitrogen takes place.

4 0
3 years ago
Organism population size is controlled by different types of limiting factors. The Serengeti Plains are part of the African sava
vlada-n [284]
I would go with c because its tells you right in there that the ecosystem help who lives around that area.
4 0
4 years ago
Imagine that a developer came in and built a large mall and parking lot on top of the sandy soil in your example. How do you thi
Anit [1.1K]

Answer:

The mall and parking lot are not built on a solid foundation.

Explanation:

Sandy soil can erode and possible destroy the mall and parking lot will start deteriorating because of the poor choice of trying to save money but in the long run it will cost more to rebuild on a sold foundation.

8 0
3 years ago
A students body temperature is 98.6oF. What is their temperature on the Celcius scale?
Scilla [17]

Answer:

Minus 36 and divide the rest by two

Explanation:

3 0
4 years ago
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A clot forms long sticky threads made of linked ____. after the injury heals, ____ can digest/lyse the clot
Murrr4er [49]
Fibrinogen, plasmin
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