Two monosaccharides joined by a glycosidic bond, for example sucrose, lactose and maltose.
Sucrose is glucose plus fructose (table sugar, transported in plants), lactose is glucose plus galactose (milk sugar) and maltose is two glucose (from starch digestion, in germinating seeds). They are broken into monosaccharides by enzymes such as sucrase, lactase and maltase on intestinal cell surfaces.
Two monosaccharides joined by a glycosidic bond, for example sucrose, lactose and maltose.
Disaccharides is one of the 51 topics in Biomolecules & Biochemistry. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Condensation and Hydrolysis, Carbohydrates, Monosaccharides.
Lactose intolerance results from low lactase activity in adults, so lactose reaches the colon and is fermented by bacteria, causing gas.
Disaccharides is a Beginner topic, so no earlier topic is required. Other Beginner topics in Biomolecules & Biochemistry that pair well with it include Water Properties, Carbon Chemistry, Carbohydrates.
The closest topics to Disaccharides are Condensation and Hydrolysis, Carbohydrates, Monosaccharides, Glycosidic Bond. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Disaccharides. To practise the whole of Biomolecules & Biochemistry, use the Biomolecules & Biochemistry quiz.
Disaccharides: Two monosaccharides joined by a glycosidic bond, for example sucrose, lactose and maltose. Condensation and Hydrolysis: Dehydration synthesis joins monomers by removing water, while hydrolysis splits polymers by adding water. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Condensation and Hydrolysis and explain the difference aloud. Finally, take the Biomolecules & Biochemistry quiz and come back to this page for any question you miss.
Dehydration synthesis joins monomers by removing water, while hydrolysis splits polymers by adding water.
⚗️ Biomolecules & BiochemistrySugars and starches built from carbon, hydrogen and oxygen that serve as fuel and structural material.
⚗️ Biomolecules & BiochemistryThe simplest sugars, such as glucose, fructose and galactose, with the formula near CH2O per carbon.
⚗️ Biomolecules & BiochemistryThe covalent link between sugar units formed by condensation, alpha in starch and beta in cellulose.
⚗️ Biomolecules & Biochemistry