Key glycolytic enzymes are all except:
**Core Concept**
The question is testing the knowledge of key enzymes involved in the glycolytic pathway, which is a crucial metabolic pathway that converts glucose to pyruvate, generating energy for the cell.
**Why the Correct Answer is Right**
Glycolysis involves a series of enzyme-catalyzed reactions that break down glucose into pyruvate. Key glycolytic enzymes include hexokinase (or glucokinase in the liver), phosphofructokinase-1, aldolase, triosephosphate isomerase, glyceraldehyde-3-phosphate dehydrogenase, phosphoglycerate kinase, phosphoglycerate mutase, enolase, and pyruvate kinase. These enzymes catalyze the conversion of glucose to pyruvate, generating ATP and NADH in the process.
**Why Each Wrong Option is Incorrect**
*Option A:*
*Option B:*
*Option C:*
*Option D:*
**Clinical Pearl / High-Yield Fact**
It's essential to remember that glycolysis is a key metabolic pathway that is regulated by various enzymes, hormones, and environmental factors. Understanding the regulation of glycolysis is crucial for managing conditions such as diabetes mellitus, where impaired glucose metabolism can lead to hyperglycemia.
**Correct Answer:** A. **Hexokinase (or glucokinase in the liver)**