ch5.1 food requirements

Question 1

monosaccharides

Answer 1

。glucose (e.g. fruits and honey)
。fructose (e.g. fruits and honey)
。galactose (e.g. dairy products)
。reducing sugars

Question 2

disaccharides

Answer 2

。maltose (glucose+glucose) (e.g. germinating barley)
。sucrose (glucose+fructose) (e.g. sugar cane)
。lactose (glucose+galactose) (e.g. dairy products)

Question 3

polysaccharides

Answer 3

。starch (storage form in plants)
。glycogen (storage form in animals, livers and muscles)
。cellulose (major component in plant cell walls, dietary fibre)

Question 4

functions of carbohydrates

Answer 4

1) main energy source

。monosaccharides -> broken down directly
。disaccharides are broken down when needed
。17.1 kJ

2) energy reserve

。excess carbohydrates are converted into glycogen in livers or muscles

3) source of dietary fibre

。cellulose