Introduction to Metabolism Flashcards

1
Q

What is energy?

A

the capacity to cause change

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2
Q

What is Metabolism?

A

ALL of the chemical reactions of an organism

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3
Q

Describe the First Law of Thermodynamics

A

Energy Can be transferred and transformed and Cannot be created or destroyed

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4
Q

What is Kinetic energy?

A

The energy of motion.Heat/Thermal Energy

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5
Q

What is Potential energy?

A

Chemical Energy.Location or Structure

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6
Q

Describe the Second Law of Thermodynamics.

A

Some energy becomes unavailable
– Extremely inefficient
» Most energy lost as heat
– Increases Entropy
» Measure of disorder

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7
Q

What is entropy?

A

the measure of a system’s thermal energy per unit temperature that is unavailable for doing useful work

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8
Q

What is chemical energy?

A

The energy released from a substance, or absorbed in the formation of a chemical compound, during a chemical reaction. polymers from monomers

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9
Q

What is an endergonic reaction?

A

Positive ΔG.The energy required is required and is Non-spontaneous

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10
Q

What is an exergonic reaction?

A

Negative ΔG.Energy is released and is Spontaneous

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11
Q

ΔG

A

Free Energy
Gfinal – Ginitial

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12
Q

________ is the energy currency of the cell

A

ATP

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13
Q

ATP —> ADP + P + ________

A

h20

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14
Q

ADP + P + ________ —> ATP

A

h2o

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15
Q

What are enzymes?

A

Protein macromolecules that act as catalysts

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16
Q

How can enzymatic reactions be sped up?

A

More substrate = faster enzymatic rate

17
Q

How do enzymes speed up reactions?

A

– Protein macromolecules
that act as catalysts
* Speed up naturally
occurring reactions

18
Q

sucrose + sucrase  glucose + fructose
Which of the above is the enzyme?

A

Sucrase -> enzyme

19
Q

sucrose + sucrase  glucose + fructose
Which of the above is the substrate?

A

Sucrose -> substrate

20
Q

What is the active site of an enzyme, what binds there?

A

the region that binds the substrates(and cofactor if any)

21
Q

In what two ways can enzyme inhibitors prevent metabolic reactions?

A

Competitive Inhibition and Noncompetitive Inhibition