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NYCC Biochem I > Polysaccharides > Flashcards

Polysaccharides Flashcards

1
Q

What is the composition of starch?

A

More than 10 monosaccharides

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2
Q

What are the bonds in starch?

A

Amylose: Non-branching alpha 1-4 glycosidic bonds
Amylopectin: non-branching alpha 1-4; branching alpha 1-6 glycosidic bonds

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3
Q

What are the food sources of starch?

A

Cereals, potatoes, vegetables

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4
Q

What is the composition of glycogen?

A

Glucose

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5
Q

What are the bonds in glycogen?

A
  • non-branching alpha 1-4 glycosidic bonds
  • branching alpha 1-6 glycosidic bonds (more branching than amylopectin)
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6
Q

What tissues make and store glycogen?

A

Liver & muscle

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7
Q

What is the composition of cellulose?

A

Glucose

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8
Q

What are the bonds in cellulose?

A

Non-branching beta 1-4 glycosidic bonds

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9
Q

What is a food source of cellulose?

A

Celery

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10
Q

What type of fiber is cellulose?

A

Insoluble

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11
Q

Where in plants is cellulose found?

A

Plant cell walls

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12
Q

What is the function of the fiber in cellulose?

A

Gives stool bulk
Reduces bowel transit time -> protect against colon cancer

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13
Q

What type of fiber is beta glucans?

A

Soluble

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14
Q

What is a food source of beta glucans?

A

Oats

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15
Q

What is the function of beta glucans?

A

Feel full

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16
Q

RDA for fiber

A

(5 cups fruit/veg)
Women 25g/day
Men 38g/day

17
Q

What disease is beta glucans protective against?

A

CVD

18
Q

What is the composition of inulin?

A

Fructose

19
Q

What are food sources of inulin?

A

Tubers, artichoke roots, dahlias, dandelions, onions, bananas

20
Q

What is the function of fructooligosaccharides? (FOS)

A
  • pre-biotic - food for good intestinal bacteria
  • natural antibiotic
21
Q

Define probiotic

A

Bifidobacteria + lactobacilli
- good intestinal bacteria

22
Q

What does fructooligosaccharides (FOS) act like in the intestines?

A

Natural antibiotic

NYCC Biochem I (46 decks)

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