The production of glycogen from glucose is termed as:

Question

Accepted Answer

The correct option is (1):
Glycogenesis is the correct term for the production of glycogen from glucose. This process is an important anabolic pathway where glucose molecules are polymerized and stored as glycogen, primarily in the liver and skeletal muscles. The term itself is a combination of "glyco-" (glycogen) and "-genesis" (creation or beginning). Glycogenesis is essential for glucose homeostasis in the body, as it allows the liver and muscles to clear excess glucose from the bloodstream, typically after a carbohydrate-rich meal. The pathway is regulated by the hormone insulin, which activates the key enzyme responsible for chain elongation, glycogen synthase, ensuring efficient glucose storage.

The incorrect option is (2):
Glycolysis is incorrect because it describes a completely different metabolic process: the breakdown or splitting of glucose. Derived from "glyco-" (sugar) and "-lysis" (splitting), this pathway converts a single glucose molecule into two molecules of pyruvate. Glycolysis is a catabolic process intended to generate immediate energy in the form of ATP, and to produce intermediate compounds for further cellular respiration. This energy-releasing function is contrary to the question, which asks for the synthetic, or storage-creating, pathway.

The incorrect option is (3):
Glycogenolysis is also incorrect because it is the catabolic process that breaks down stored glycogen back into glucose. The suffix "-lysis" again signifies a splitting or breakdown process. This reaction is initiated during periods of fasting or intense exercise, typically by hormones such as glucagon and adrenaline. Its primary role is to mobilize stored glucose to raise blood sugar levels. Thus, it deals with the degradation of the storage form, not the initial production or synthesis of it.

The incorrect option is (4):
"None of these" is incorrect because the accurate, scientifically established name for the metabolic pathway where glycogen is produced from glucose is, in fact, **Glycogenesis**, which is presented as Option 1. Since the precisely correct term is readily available among the choices, this option would not be selected. All major carbohydrate metabolic pathways have specific names, and Option 1 correctly identifies the synthesis route.