Carbohydrates - A Level Biology_4

What is lactose, and where is it found?

• a) It is glucose–fructose and is found in plants.

• b) It is glucose–glucose and is a common table sugar.

• c) It is beta galactose– alpha glucose and is found in mammalian milk.

• d) It is fructose–glucose and is formed during brewing.

maltose is made up of _________alpha glucoses

• five
• two
• three
• four

Sucrose is made up of an alpha glucose and a ________

• epsilon
• gamma
• fructose

• delta

_________ is made up of alpha glucose and beta galactose

• Maltose
• Fructose
• Lactose
• Sucrose

what reaction will you do to take two monosccarides and convert it into a disaccharide ?

• Hydrolysis reaction
• Oxidation reaction
• Decomposition reaction
• Condensation reaction

Which bonds are formed during condensation reaction?

• Ionic bonds
• Hydrogen bonds
• Glycosidic bond

  • /Covalent bonds

• Metallic bonds

• What molecule is typically released during a condensation reaction? or what molecule will be removed when 2 alpha glucose molecules will combine here?

• • a) Carbon dioxide

• • • b) Water

• c) Oxygen

• d) AmmoNIA

True/False statements:

• • This reaction is spontaneous and does not require any energy.

• • The product of the reaction is a single molecule with fewer atoms than the starting materials.

• • The presence of a glycosidic bond makes the resulting molecule a polysaccharide.

What type of stereochemistry leads to the formation of an alpha-glycosidic link between two carbons?

• a) Different

• b) Opposite

• c) Same

• d) Cannot be determined

Which of the following molecules are primarily composed of monomers linked by alpha(1-4) glycosidic bonds?

• a) Cellulose

• b) Lactose

• c) Glycogen and starch

• d) Fructose