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When you combine two monomers (an individual building block, e.g. a molecule of fructose) to make a polymer (the linked chain made of the monomers) you go through a process called dehydration reaction, or dehydration synthesis.
In dehydration synthesis one molecule of water is taken out from the monomers which combines them together. An unlinked monomer (e.g. the molecule of fructose and glucose) will have a hydroxyl group at one end (-OH) and a hydrogen atom at the other end (-H). When you take out the water (H20) you form a covalent bond between the end of one monomer, and the beginning of the next - linking the two monomers
You get the molecule of glucose and fructose from the molecule of sucrose.
Glucose and fructose are both six-carbon rings with hydroxyl (OH) groups bound to the carbons. To form sucrose one water molecule is released so the two monosaccharides can bind to one another.
a molecule of fructose and a molecule of glucose
The disaccharide molecule, sucrose is not formed from two glucose molecules. Sucrose is formed from one glucose molecule and one fructose molecule.
lactose
The glycogen is polymer of glucose. So glucose is monomer of glycogen. You get one molecule of glucose and one molecule of fructose from one molecule of cane sugar. So when one molecule of glucose will combine with one molecule of fructose, you will get one molecule of cane sugar.
Sucrose is a disaccharide composed of an alpha-glucose and an alpha-fructose. It has an alpha 1-2 glycosidic linkage between the two molecules.
The two monomers, glucose and fructose, combine to make the disaccharide sucrose.
Disaccharide
Fructose and Glucose are isomers of each other. That means that one part of the molecule is in a different location on the other molecule. Fructose and glucose have the same molecular formula and molecular weight.
Some examples of monosaccharides include glucose and fructose.
Sugar is really a generic term. If your talking about table sugar which is sucrose- 1 molecule of fructose bounded to 1 molecule of glucose. So one molecule of sucrose is the dimer of 1molecule glucose and 1molecule fructose. The molecular formula of Sucrose is C12H22O11. Watch what you are calling a sugar because there are disaccharides (2sugars like sucrose) and monosaccharides (single sugar like glucose).