Glykolyse Flashcards

1
Q

Amylose

A

Lineært stivelse bestående af glukose i alfa-1,4-glykosidbindinger

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2
Q

Amylopektin

A

Forgrenet stivelse med glukose i alfa-1,4-glykosidbindinger

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3
Q

Katabolisme

A

Nedbrydning af molekyler til mindre enheder for at frigive energi

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4
Q

Oxidation

A

Tab af elektroner

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5
Q

Reduktion

A

Optag af elektroner

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6
Q

Gibbs frie energi

A

Mængde energi i et system som kan anvendes til at udføre et arbejde,
G

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7
Q

Forskydning mod højre

A

Ligevægtskonstant > 1.0

Gibbd frie energi er negativ

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8
Q

Forskydning mod venstre

A

Ligevægtskonstant < 1.0

Gibbs frie energi er positiv

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9
Q

Ligevægt

A

Ligevægtskonstant 1.0

Gibbs frie energi = 0

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10
Q

Exergonisk reaktion

A

Gibbs frie energi < 0

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11
Q

Endergonisk reaktion

A

Gibbs frie energi > 0

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12
Q

Kobling med ATP-hydrolyse

A

Energi overføres ved at phosphorylering danner ustabilt intermediat (og dermed god leaving gruppe)

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13
Q

Hvorfor er phosphatgrupper gode leaving grupper?

A

Fordi phosphorylerede forbindelser generelt er mere ustabile end produkterne af deres hydrolyse

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14
Q

Bindinger i cellulose

A

Beta-1,4-glykosidbindinger som mange dyr ej kan nedbryde, fordi de mangler enzymet cellulase

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15
Q

NAD+

A

Oxideret nicotinamid adenin dinucleotid er carrier af elektroner

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16
Q

NADH

A

Reduceret nicotinamid adenin dinucleotid. Kan gå ind i mitokondrierne og aflevere elektroner til O2

17
Q

Dehydrogenering

A

Afgivelse af H-atomer. Udføres af enzymet dehydrogenase

18
Q

Koncentration af nicotinamid adenin dinucletid i cellen

A

NAD+ er høj i forhold til NADH

19
Q

Er glykolysen reversibel eller irreversibel?

A

Irreversibel fordi der er nogle irreversible trin (1, 3, 10). Reaktionerne er exergone