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MCAT Biology 01: Molecular Biology & Cellular Respiration
Vocabulary & concepts
11
Medical
Not Applicable
05/24/2009

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Cards

Term
Triacylglycerol
Definition
Glycerol backbone attached to three fatty acids
Term
Phospholipid
Definition
Glycerol backbone attached to polar phosphate group and two fatty acids
Term
Amphipathic
Definition
Phospholipd-polar at one end (phosphate group) and nonpolar at other (fatty acid)
Term
Cofactor
Definition

  • Non-protein component required for enzymatic activity
  • Two types: coenzymes or metal ions

Term
Coenzymes
Definition

  • Organic molecules
  • Two types-cosubstrates and prostethic groups 

Term
Glycolysis
Definition

  1. 2xADP+Pi + 2xNAD + 1xglucose
  2. 2xATP + 2xNADH + 2xpyruvate

Term
Fermentation
Definition

  1. Production of ethanol or lactic acid and carbon dioxide
  2. Oxidation of NADH back to NAD+ for glycolysis

Term
Pre-Kreb's Cycle
Definition

 

  1. 2xpyruvate + 2NAD+
  2. 2xCO2 + 2xNADH + 2xAcetylCoA

 

Term
Kreb's Cycle
Definition

  1. 2xAcetylCoA + 6xNAD+ + 2xADP+P + 2xFAD+ 
  2. 6xNADH + 2xATP + 1FADH2

Term
Electron Transport Chain (ETC)
Definition

  • Inner mitochondrial membrane
  • Proteins (cytochromes with heme)-oxidizes NADH
  • Electrons passed down until accepted by oxygen to form water
  • Proton-motive force-simultaneous pumping of H+ into intermembrane space
  • ATP synthase-results in net 36 ATP molecules

Term
What are the two types of phosphorylation?
Definition

 

  1. Oxidative-ATP production that uses released energy from oxidation of nutrients
  2. Substrate-level-ATP production due to direct transfer of phosphate group from an intermediate

 

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