LT1.5 Carbohydrates

The human body is capable of digesting the complex polymer starch into simpler subunits. This digestive process requires the presence of water and the enzyme amylase in order to break down starch into maltose. This is depicted below. Which of the following statements best describes the digestion of starch into maltose?

• This is a hydrolysis reaction that requires water to break down a complex polymer into simpler subunits.

• This is a dehydration synthesis reaction that produces water when forming a complex polymer from simpler subunits.

• This is a dehydration synthesis reaction that requires water to form a complex polymer from simpler subunits.

• This is a hydrolysis reaction that forms water by breaking down a complex polymer into simpler subunits.

In the reaction below, two glucose monomers combine to form the dimer maltose. Which of the following best explains the process of this reaction?

• To form a covalent bond, the monomers underwent a hydrolysis reaction.

• An ionic bond forms through dehydration synthesis, which combines the two glucose monomers and forms the maltose dimer.

• Water is added to the reaction to promote the formation of a covalent bond between the glucose monomers.

• A covalent bond forms through dehydration synthesis, which results in the formation of maltose and water.

Tags

NGSS.HS-PS1-4

Which of the following questions would a researcher most likely ask if they wanted to know whether a hydrolysis reaction or a dehydration synthesis reaction is occurring?

• Is an enzyme involved in the reaction?

• Are monomers identical to one another?

• Is water a reactant or product of the reaction?

• Which polymer is involved in the reaction?

What element(s) are in carbohydrates?

• Carbon / Hydrogen

• Oxygen

• Phosphorus

• Nitrogen

• Sulfur

Tags

NGSS.HS-LS1-6

Which of the following are structural polysaccharides?

• Cellulose

• Glycogen

• Chitin

• Starch

Which of the following are storage polysaccharides?

• Cellulose

• Glycogen

• Chitin

• Starch

What polysaccharides are animals unable to break and why?

• Cellulose due to alpha glyosidic linkages

• Cellulose due to beta glyosidic linkages

• Starch due to alpha glyosidic linkages

• Starch due to beta glyosidic linkages

Which of the following is a monosaccharide?

• Glucose

• Maltose

• Lactose

• Sucrose

Which of the following describes the process involved in metabolizing carbohydrates?

• During hydrolysis a water molecule is added to break the bond between the monosaccharide and polysaccharide chain

• During hydrolysis a water molecule is removed to break the bond between the monosaccharide and polysaccharide chain

• During dehydration synthesis a water molecule is removed to break the bond between the monosaccharide and polysaccharide chain

• During dehydration synthesis a water molecule is added to break the bond between the monosaccharide and polysaccharide chain

Which of the following is the structural polysaccharide found in the cell wall of plants?

• Chitin

• Cellulose

• Peptidoglycan

• Glycogen