Cellular Respiration

When energy-depleted elements associated with a proton are accepted by an organic molecule, the process is called

• fermentation
• anaerobic
• aerobic
• catabolism

An example of anaerobic would be

• production of sulfates from H2S
• production of methane by methanogens
• glycolysis by purple bacteria
• utilization by methane by methanogens

The end product of glycolysis 

• NADH
• acetyl-CoA
• lactate
• pyruvate

The final output of the Krebs cycle includes all of the following except

• NADP
• FADH₂
• ATP
• CO₂

The usefulness of fermentation as a means of deriving energy is limited because

• it cannot generate enough ATP
• it produces too much NH₂
• the end products are toxic to the producer 
• it uses more energy than it produces

Which of the following is not a product of fermentation?

• CO₂
• O₂
• ethanol 
• lactate

In aerobic cellular respiration, which generates more ATP, substrate-level phosphorylation or chemiosmosis?

• substrate-level phosphorylation
• chemiosmosis
• both generate the same amount of ATP
• neither generates any ATP

NADH is produced during 

• glycolysis
• the oxidative of pyruvate 
• the Krebs cycle
• all of the above

Catabolic processes

• make complex molecules from simpler ones
• break complex molecules into simpler ones
• occur only in autotrophs
• occur only in heterotrophs

During respiration, NADH donates two electrons to the carrier know as ubiquinone. When this happens, ubiquinone:

• becomes oxidized.
• passes the electrons directly to O₂ which is reduced to water.
• pumps protons across the inner mitochondrial membrane.
• all of the above.