Digital PSAT Reading and Writing Practice Question 164: Answer and Explanation

Question: 164

The third step of glycolysis involves the the hormonally-controlled phosphorylation of fructose-6-phosphate into fructose-1, 6-bisphosphate. When glucose is abundant, pancreatic insulin induces the forward glycolytic catalysis of this reaction, allowing the production of fructose-1, 6-bisphosphate, which in turn is cleaved into glyceraldehyde-3-phosphate and dihydroxyacetone phosphate. When glucose is scarce, pancreatic glucagon blocks glycolysis, and induces the gluconeogenic production of fructose-6-phosphate, which is subsequently isomerized into glucose-6-phosphate, and released into the blood.

According to the text, bodily regulation of glucose levels is best described as

• A. artificial.
• B. dynamic.
• C. arbitrary.
• D. static.

Correct Answer: B

Explanation:

(B) The text discusses a step of glycolysis and how it works in tandem with the body's current levels of glucose. So, dynamic, or in a "state of constant activity and change," is appropriate. Artificial means "fake," while arbitrary means "random." Static, or "unchanging," is the opposite of dynamic.