Lecture 1 Flashcards

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1
Q

fxns of cellular energy

A
  • drive chemical rxns
  • transport substances across membranes
  • mechanical work
  • keep organisms warm
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2
Q

cellular respiration

A
  • catabolic rxn
  • includes aerobic respiration and fermentation
  • aerobic: sugar + 6 O2 –> 6 CO2 + 6 H2O + energy (ATP+heat)
  • fermentation: produces ethanol or lactate; sugar –> 2 CO2 + 2 eth/lac + energy (ATP+heat)
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3
Q

catabolic pathways

A
  • fermentation: partial degradation of sugars occuring without oxygen
  • aerobic respiration: brak down of organic molecules using oxygen
  • anaerobic respiration: similar to aerobic but without oxygen
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4
Q

catabolic pathways

A
  • yield energy by oxidizing organic fuels
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5
Q

redox rxns

A
  • chemical rxns involving transfer of electrons
  • transfer of electrons during chemical rxns release energy stored
  • energy used to synthesis ATP
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6
Q

oxidation

A
  • loss of electrons
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7
Q

reduction

A
  • gain of electrons
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8
Q

electron transfer

A
  • electronegativity
  • electron affinity
  • electron loses potential energy when shifted from less electronegative atom to more electronegative one (energy released)
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9
Q

electron sharing

A
  • redox occurs when transfer of electrons not complete
  • involves change in degree of electron sharing in covalent bonds
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10
Q

glycolysis and citric acid cycle

A
  • involve braking down complex molecules to simpler
  • release NADH; FADH2; ATP
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