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The lining of the abdominal cavity and some of its organs is called the:

Protrusion of a body part through tissues that normally contain it is called a:

What is the technical name for having a hunchback?

The opposite of distal is ____

The opposite of plantar is ____.  

The correct order of the vertebral segments is:

What is term for the sac of fluid near a joint that helps with lubrication?

Which of the following correctly describes an obligate intracellular parasite?

Which virus has a broad host range and can infect multiple species?

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 the substrate of Kinase 1?