mutation affecting the biochemical pathway leading to the synthesis of leucine.
Explanation:
According to my research on studies conducted by various biologists, I can say that based on the information provided within the question this strain has a mutation affecting the biochemical pathway leading to the synthesis of leucine. Since a mutation is a permanent alteration in the DNA sequence, thus changing its affects.
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The kidney is referred to as an excretory organ because it excretes nitrogenous wastes. It is also a major homeostatic organ because it maintains the electrolyte Acid-Base, and fluid balance of the blood.
