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Biology > Polysaccharides > Flashcards

Polysaccharides Flashcards

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1
Q

What is the role of starch?

A

It’s an energy reserve/store in plants

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2
Q

What is the role of glycogen?

A

Animal equivalent of starch - energy store/reserve

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3
Q

What is the role of cellulose?

A

Cell wall of plants

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4
Q

Why does starch make a good energy store? (3)

A

Compact grain
Chemically inert
Insoluble

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5
Q

What glucose is starch made up of?

A

Long chains of alpha glucose

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6
Q

What are the two forms of Starch?

A

Amylose

Amylopectin

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7
Q

What are 3 macromolecules of polysaccharides?

A

Cellulose
Starch
Glycogen

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8
Q

What’s Amylose made up of?

A

Long chain of thousands of alpha glucose

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9
Q

What do hydrogen bonds do to Amylose?

A

Shorten and coil it

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10
Q

What bonds hold monomers together in Amylopectin?

A

1,4 and 1,6 glycosidic bonds

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11
Q

What is the test for starch?

A

Add a couple of drops of iodine solution

If present, will turn blue/black

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12
Q

Where is glycogen mostly found?

A

Liver and muscles

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13
Q

What makes glycogen so compact?

A

It has more 1,6 glycosidic bonds between alpha glucose

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14
Q

What is cellulose made of?

A

Beta glucose

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15
Q

What bonds hold monomers in cellulose together?

A

1,4 glycosidic

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16
Q

What is the appearance of monomers in cellulose?

A

Every other beta glucose is flipped 180degrees

17
Q

Is cellulose impermeable or permeable?

A

Permeable

18
Q

What is a long chain of cellulose called?

A

Microfibrils

19
Q

What are microfibrils held together by? What does this make?

A

Hydrogen bonds, making a fibre

Biology (9 decks)

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