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Bio 1113 > Chapter 8 > Flashcards

Chapter 8 Flashcards

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Biology 101 flashcards
1
Q

Catabolic rxns

A

Breakdown complex molecules and real ease energy

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2
Q

Anabolic rxns

A

Use energy to build complex molecules

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3
Q

Capacity to cause change

A

Energy

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4
Q

Associated w/random mvmts of molecules

A

Heat-kinetic energy

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5
Q

Available for release in a chemical rxn

A

Chemical-potential energy

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6
Q

Study of energy transformations that occur in a collection of matter

A

Thermodynamics

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7
Q

1st law of thermodynamics

A

Energy can be transferred/transformed but not destroyed

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8
Q

2nd law of thermodynamics

A

Every energy transformation or transfer increases the entropy of the universe

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9
Q

Measure of disorder/randomness

A

Entropy

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10
Q

Cells do 3 types of work:

A
  • chemical (building polymers)
  • transport (pumping molecules across membrane)
  • mechanical (muscle contraction)
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11
Q

Use of exergonic rxns to drive endergonic rxns

A

Energy coupling

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12
Q

Breaking a bond

Releasing energy

A

Exergonic rxn

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13
Q

Requires energy

A

Endergonic

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14
Q

Proteins (mostly) which act as catalysts and speed up rxns

A

Enzymes

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15
Q

Act by lowering/raising the activation energy?

A

Lowering

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16
Q

True or false: can make endergonic rxn exergonic

A

FALSE

17
Q

Reactant acted on by the enzyme

A

Subtrate

18
Q

Region that actually binds the substrate

A

Active site

19
Q

Binding of substrate causes the enzyme to slightly change shape

A

Induced fit

20
Q

Nonprotein helpers

A

Cofactors

21
Q

Resemble subtrate sand compete for active site

A

Competitive

22
Q

Bind to enzyme somewhere other than active site and cause a conformational change which decrease activity

A

Noncompetitive

23
Q

Binding of regulatory molecule at one site affects the activity at a separate site

A

Allosteric regulation

24
Q
  • end prod of a pathway can bind to an enzyme that acts earlier in the pathway and inhibit it
  • prevent cells from wasting energy to make xs product
A

Feedback inhibition

25
Q

Enzymes can be compartmentalized or assembled into multienzyme complexes

A

Localization of enzymes

Bio 1113 (13 decks)

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