In the Following Schematic Diagram of a Simple Signaling Pathway

question 21

Multiple Choice

In the following schematic diagram of a simple signaling pathway, protein Z regulates the activity of protein X, which is an upstream protein kinase, through a negative feedback loop. Which of the following better describes protein Z?

• A) It is a protein kinase that is activated by phosphorylation.
• B) It is a protein kinase that is inactivated by phosphorylation.
• C) It is a protein phosphatase that is activated by phosphorylation.
• D) It is a protein phosphatase that is inactivated by phosphorylation.

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Definitions:

Activity-Based Costing

A detailed approach to determining the cost of a product or service by attributing overhead costs based on each product's activities.

Activity Cost Pools

Groups of individual costs caused by specific activities, used in activity-based costing to allocate costs to products or services.

Overhead Cost Per Unit

The allocation of total fixed and variable manufacturing overhead costs to individual units of product.

Product F

A specific item or good produced by a company, referred to as "Product F" for identification or category purposes.