Question

74. Choose the false statement:

A. Energy metabolism during anaerobic activity is limited to the breakdown of monosaccharides ranging in length from 3-6 carbons; because fatty acids feed directly into the Krebs cycle as 2C fragments, they can only be catabolized aerobically.

B. About 20% of the ATP formed during cellular respiration is formed through substrate level phosphorylation; the balance is formed through oxidative phosphorylation.

C. Cytochromes a and a3, which together form the cytochrome oxidase complex, have a higher affinity for electrons than do complexes found further up the electron transport chain, including Coenzyme Q (ubiquinone), and cytochromes b, c and c1.

Answer 1

74.  

• Energy metabolism during anaerobic activity is limited to the breakdown of monosaccharides ranging in length from 3-6 carbons; because fatty acids feed directly into the Krebs cycle as 2C fragments, they can only be catabolized aerobically.
  Glucose 2 ATP Anaerobic Glycolysis G-3-P Net 2 ATP e/ Fermentation pyruvic acid Lactic Acid Coenzyme A CO Amino acids ен Glycerol 2.C _Fatty Acids acctyl Krebs Aerobic Cycle Metabolism 2 ATP CO2 en Fats j 34 ATP Electron Transport System H2O
  
• The electron transport chain and chemiosmosis make up oxidative phosphorylation. And they for over 80% of ATP made during glucose breakdown in cellular respiration. Thus,  About 20% of the ATP formed during cellular respiration is formed through substrate level phosphorylation; the balance is formed through oxidative phosphorylation.
• Cytochromes a and a3, which together form the cytochrome oxidase complex or complex IV, have a higher affinity for electrons than do complexes found further down the electron transport chain, including Coenzyme Q (ubiquinone), and cytochromes b, c and c1.

NADH NADH-Q oxioreductase Complex I Succinate-Q reductase Complex 11 Increasing Affinity for Electrons Q-cytochrome C oxioreductase Complex III + Cyt C Cytochrome C oxioreductase Complex IV

Thus the false statement among the given is:

C. Cytochromes a and a3, which together form the cytochrome oxidase complex, have a higher affinity for electrons than do complexes found further up the electron transport chain, including Coenzyme Q (ubiquinone), and cytochromes b, c and c1.