Monosaccharides and disaccharides

Which functional groups are found in the open-chain form of carbohydrates?

• formyl group
• carboxyl group
• oxo group
• hydroxyl group
• alcoholic hydroxyl and oxo group

Which describes glucose best?

• disaccharide
• hexose
• aldohexose
• ketose
• ketohexose

Which one is a ketohexose from the list?

• fructose
• glucose
• saccharose
• all of them
• none of them

Which line includes only monosaccharides?

• fruit sugar, grape sugar, malt sugar
• ribose, glucose, fructose
• saccharose, cellobiose, glyceraldehyde
• beet sugar, grape sugar, malt sugar
• none of them

Which line includes only disaccharides?

• maltose, sucrose, fructose
• starch, cane sugar, cellulose
• cellobiose, maltose, starch
• amylose, amylopectin, cellobiose
• none of them

Which line shows CORRECTLY the products of the hydrlysis of the disaccharide?

• sucrose --> alfa-D glucose + alfa-D fructose
• maltose --> 2 beta-D glucoses
• cellobiose --> alfa-D glucose + beta-D ribose
• maltose --> 2 alfa-D glucoses
• sucrose --> 2 beta-D glucoses

Polysaccharides are … .

• the derivatives of the polymerisation of monosaccharides
• the derivatives of monosaccharides with ether bond
• the oxidation derivatives of monosaccharides
• the reduction derivatives of monosaccharides
• none of them

Which solution gives the greatest amount of silver during Tollens test?

• 50g 10w% grape sugar solution
• 100g 1w% fruit sugar solution
• 200g 5w% beet sugar solution
• They give equal amount.
• None of them gives positive silver mirror test.

Polysaccharide.

• glucose
• sucrose
• both of them
• neither of them

Disaccharide.

• glucose
• sucrose
• both of them
• neither of them