Carbohydrates and Intermediary Metabolism Flashcards

(34 cards)

1
Q

what is the major metabolic process for most organism

A

carbohydrate catabolism

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2
Q

what types of electrons do carbohydrates have

A

H atom-associated electrons; highly oxidizable; major energy source

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3
Q

what type of sugars is carbohydrates stored as in animals and plant

A

glycogen (animals) and starch (plants)

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4
Q

what type of structural and protective functions do carbohydrates have on animals cells

A

extra cellular matrices of animal cells

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5
Q

what are the 3 main monosaccharides

A

glucose, galactose and fructose

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6
Q

what type of bond link monomers together

A

glycosidic bonds

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7
Q

what type of bond are glycosidic bonds

A

covalent bonds

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8
Q

what is an anomeric carbon

A

carbon is flipped over//the OH group is on the other side

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9
Q

what is the 3 important disaccharides

A

lactose, maltose and sucrose

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10
Q

how do we get maltose into the body

A

through diet

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11
Q

what type of sugar is maltose

A

reducing sugar

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12
Q

why is maltose a reducing sugar

A

anomeric C-1 is available for oxidation

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13
Q

when glucose and glucose form together, what type of reaction is it and what are the products

A

condensation
maltose and water

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14
Q

when maltose is broken down, what are the products and what process does it go through

A

glucose and glucose
hydrolysis

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15
Q

what is the main sugar in milk

A

lactose

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16
Q

what type of sugar is lactose

A

reducing sugar

17
Q

what type of sugar is sucrose

A

non-reducing sugar

18
Q

what are homopolysaccharides

A

single monomeric species

19
Q

what are heteropolysaccharides

A

have two or more monomer species

20
Q

what are the two types of glucose polymer in starch

A

amylose and amylopectin

21
Q

in terms of structure, what is the difference in amylose and amylopectin

A

similar but amylopectin contain branches

22
Q

what type of structure does starch have

A

alpha helices

23
Q

what is the ratio between reducing ends to non-reducing ends in starch

A

not many (reducing) to a lot (non-reducing)

24
Q

glycogen is a polymer of what

25
what is the purpose of glycogen in liver
acts to replenish blood glucose when fasting
26
what is the purpose of glycogen in skeletal muscle
catabolism produces ATP for contraction
27
is glycogen more branched or is starch
glycogen
28
what does it mean if polymers have many non-reducing ends
speeds up the formation or degradation of them
29
what are 3 reasons as to why glucose is stored as polymers
-compactness -amylopectin and glycogen have many non reducing agents -the polymers form hydrated gels and re not really "in solution"
30
what are glycoproteins
proteins that have carbohydrates attached to it by covalent bonds
31
carbohydrate attached to proteins may:...
- increase the protein solubility - influence protein folding and conformation - protect it from degradation - act as a communication between cells
32
what are glycosaminoglycans (GAGs)
un-branched polymers made from repeating units if hexuronic acid and an amino-sugar
33
where are glycosaminoglycans located
in mucus and also synovial fluid around the joints
34
proteoglycans