energy And Diet

Question 1

how are di/polysaccharides formed

Answer 1

monosaccharides join by condensation reaction to form disaccharide releasing a molecule of water. a glycosidic bond is formed.

Question 2

Two examples of monosaccharide

Answer 2

• glucose (6 carbon atoms )
• ribose (5 C atoms ) - component od DNA&RNA

Question 3

3 disaccharides and their components

Answer 3

• glucose + glucose -> maltose
• glucose + galactose-> lactose
  -glucose+ fructose -> sucrose

Question 4

Two examples of polysaccharides

Answer 4

• glycogen ( in animals )
• starch ( energy storage in plants )

Suitable for storage due to its compact nature and low solubility in water

Question 5

Relate glycogen to its function

Answer 5

numerous side branches —> easily hydrolysed—> easy access to stored energy

Question 6

Relate starch to its function

Answer 6

amylose = 1,4 bonds and unbranched so lots can be found in small spaces , compact

amylopectin = 1,6 bonds—> doible bonds in chain causes kinks—> kinks allow it to be hydrolysed quickly to release energy

Question 7

How is a triglyceride formed

Answer 7

One glycerol molecule forms 3 ester bonds with three fatty acids through condensation reaction