Question

The process of formation of glucose from lipids is called
A. Gluconeogenesis
B. Lipogenesis
C. Glycogenesis
D. Glycogenolysis

Answer 1

Hint: Glucose is produced by plants by photosynthesis. In animals, glucose can be produced from non-carbohydrate sources by neoglucogenesis.

Complete answer: Glucose or ${C_6}{H_{12}}{O_6}$ is a simple carbohydrate and the most abundant monosaccharide. It is the most important energy source for all organisms.
It is made up of six carbon atoms and an aldehyde group –hence called ‘aldohexose’.
Glucose is produced by plants using the photosynthetic process.
In animals, glucose can be synthesized from non-carbohydrate precursors – the process is called gluconeogenesis or neoglucogenesis.
Some of those non- carbohydrate precursors are amino acid, lipid, lactate, etc. Substrates for gluconeogenesis may be any non-carbohydrate compound which can be converted to pyruvate or intermediates of the glycolytic pathway.
The substrates in the case of lipids include glycerol and odd-chain fatty acids.

So, the correct answer is A. Gluconeogenesis

Additional information: Gluconeogenesis is a pathway containing a series of eleven enzyme-catalyzed reactions. The pathway will start in either the liver or kidney, in the mitochondria or cytoplasm of those cells, this being dependent on the substrate being widely used.

Note: In plants glucose is mainly stored as starch and amylopectin. In animals, it is stored as glycogen. A breakdown of glycogen occurs by glycogenolysis. Glucose is broken down in pyruvate by glycolysis.