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BIO101 > Metabolism > Flashcards

Metabolism Flashcards

1
Q

what is the definition of metabolism

A

the sum of all reactions occurring in the cell

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2
Q

what are the two types of metabolism

A

catabolism and anabolism

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3
Q

what is a catabolic reaction

A

releases energy, breaks down molecules

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4
Q

what is a anabolic reaction

A

requires energy, builds bigger molecules from smaller ones

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5
Q

what is free energy

A

energy released from catabolism that is available to be used in anabolism

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6
Q

what is the change in free energy

A

delta g

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7
Q

reactions with a negitive delta g are…………

A

exergonic as energy is released

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8
Q

reactions with a positive delta g are……….

A

endergonic as energy is absorbed

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9
Q

what stores free energy

A

ATP

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10
Q

what are the three types of cellular work

A

transport, mechanical, chemical

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11
Q

what does energy coupling refer to

A

exergonic reaction providing the energy for an endergonic one

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12
Q

what is ATP hydrolysis

A

converting ADP to ATP to store energy and ATP hydrolysis to release energy stored in the extra phosphate bond

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13
Q

what is activation energy

A

energy required for reactant to be at reactive state

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14
Q

what do catalysts do

A

lower the activation energy and therefore the rate of reaction

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15
Q

is there more change in delta g with a catalyst

A

no

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16
Q

what are examples of biological catalysts

A

enzymes, RNA, protein

17
Q

active site on a enzyme is

A

where substrate binds to the enzymes

18
Q

what is a competitive inhibitor

A

stops the substrate from binding to the active site

19
Q

what is a non competitive inhibitor

A

binds to another binding site which changes the shape of the active site so the substrate cant fit

20
Q

how is the amount of enzyme activity regulated

A

gene level

21
Q

how is the activity of enzymes regulated

A

temporary inhibition of the protein through reversable changes in its shape

22
Q

What is feedback inhibition

A

mechanism for turning off biosynthetic pathways, product binds to first enzyme in the pathway which alters it shape temporarily till the product is used

23
Q

what is the name for the enzymes with many binding sites

A

allosteric enzymes

24
Q

what is bioenergetics

A

flow of energy

25
Q

what is bioenergetics

A

flow of energy

BIO101 (10 decks)

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