Question:
A---enzyme A------>B----enzyme B------>C
Refer to the metabolic pathway illustrated above. If A, B, and C are all required for growth, a strain that is mutant for the gene-encoding enzyme A would be able to grow on medium supplemented with _____.
A) nutrient A only
B) nutrient B only
C) nutrient C only
D) nutrients A and C
Answer:
B) nutrient B only
Explanation:
The mutant has a mutation in the gene that codes for the enzyme A. Therefore, this mutant would not be able to convert the substance A into B. Without the presence of substance B, the final product can not be formed. However, if the mutant is supplemented with the substrate "B", it can convert the B into the final product (substance C). Therefore, the mutant would be able to grow in the medium to which the already prepared substance B has been added.
Hi There!
Question - What evidence did Wegener make use of to develop the theory of continental drift?
Answer - A. Similar fossils were found on different continents.
Why - The reason I say this is because when Wegener found this doscoverey he had proven his theory of continental drift.
Hope This Helps :)
Answer:
It has high temperatures and low precipitation. the reason this would be corect is because, if very little preicipitation/rain/water doesn't happen then how are the tree suppsoed to get it nutrients or how are the leaves suposed to get its nutrients so it doesn't because rotten and fall of the branches. Some areas that may not have much precipitation coming in, may most likely not have tress in the whole area or everywhere.
