An Enzyme Catalyzes a Substrate into a Final Product

question 22

Multiple Choice

An enzyme catalyzes a substrate into a final product. When the concentration of the final product is high enough, it binds to a regulatory site on the enzyme. This binding at the regulatory site changes the shape of the enzyme, which prevents it from binding the substrate and prevents formation of more final product. This is an example of a(n) ________.

• A) posttranslational modification
• B) allosteric enzyme
• C) translational repressor
• D) methylation

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Definitions:

CT Scan

A medical imaging technique that uses computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional images of specific areas of a scanned object.

Three-Dimensional

Describing an object or space that has height, width, and depth, giving it a sense of volume.

Digital Subtraction Angiography

A medical imaging technique used in radiology for visualizing blood vessels by subtracting a 'pre-contrast image' or the mask from subsequent images, once the contrast medium has been introduced into a structure.

Dynamic Spatial Reconstruction

An advanced imaging technique that allows for three-dimensional visualization of anatomical structures in motion.