Class IV and Class V mutations would be less likely to lead to Cystic Fibrosis (CF).
Class IV mutation or Conduction mutation involves reduced chloride conductance. It changes the shape of the protein channel so that chloride cannot move easily in and out of the cells. Less than 3% of people with cystic fibrosis in Europe have this type of mutation.
Class V or Insufficient Protein mutation is associated with reduced protein levels. It results in a reduction in the amount of CFTR protein produced by the cells. Less than 3% of people with cystic fibrosis in Europe have this type of mutation.
These two classes of mutations cause a milder reduction in CFTR function.
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Answer:
B
Explanation:
Took the test and got a A
:-)
Let us consider a drop of water in a river. The droplet flows to a larger body of water such as a lake. From here, or even from the river, the droplet changes from the liquid to the vapor phase via the process of evaporation and goes into the atmosphere. In the atmosphere, the droplet is condensed back into the liquid phase in the form of cloud. When a sufficient amount of water has been created in the clouds, it precipitates back on to the ground and flows into rivers and streams again.<span />
