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26 May, 18:09

Kinases are enzymes that can phosphorylate (transfer phosphate groups onto) macromolecules such as proteins. A particular kinase, Kinase 1 is known to promote cell division. It promotes cell division by phosphorylating Protein X. Phosphorylation of Protein X activates Protein X. Once activated, Protein X stimulates the production of other proteins such as Protein Y and Z that directly promote cell division. In order to function, Kinase 1 requires the presence of Metal A. However, in the presence of Protein A, Kinase 1 is nonfunctional. From the description, what is considered the substrate of Kinase 1?

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  1. 26 May, 18:22
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    The correct answer is "Protein X".

    Explanation:

    As stated in the question, Kinases are enzymes that can phosphorylate (transfer phosphate groups onto) macromolecules such as proteins. In this case, the phosphorylation of Protein X promotes cell division and Kinase 1 is known for promoting cell division as well. Therefore, it could be assumed that the substrate of Kinase 1 is Protein X and that Kinase 1 promotes cell division by phosphorylating it.
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