3.1.2 Carbohydrates

Question 1

What is the structure of glycogen in animals?

Answer 1

• Alpha glucose monomers.

• Polysaccharide.

• Has 1-4 glycosidic bonds.

• Is branched and has many additional 1-6 glycosidic bonds.

• Highly branched so glucose is accessible for respiration.

Question 2

What is the structure of cellulose in plants?

Answer 2

• Beta-glucose monomers.

• Polysaccharide.

• Has 1-4 glycosidic bonds with alternating molecules being
rotated by 180 degrees.

• Straight, unbranched chains.

• Straight chains ideal for cell wall, have crosslinks for stability.

Question 3

What is the structure of starch in plants?

Answer 3

• Alpha glucose monomers

• Polysaccharide

• Has 1-4 glycosidic bonds

• Amylose is helical

• Amylopectin is branched and has additional 1-6 glycosidic bonds

• Insoluble so doesn’t effect water potential

• Branched so accessible for respiration

Question 4

What is the structure of starch in plants?

Answer 4

• Alphaglucose monomers

• Polysaccharide

• Has 1-4 glycosidic bonds

• Amylose is helical

• Amylopectin is branched and has additional 1-6 glycosidic bonds

• Insoluble so doesn’t effect water potential

• Branched so accessible for respiration