Bio 1050 Exam 3 Practice Questions and Correct Answers
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Course
BIO 1050
Institution
BIO 1050
Cellular respiration an aerobic process that produces ATP through glycolysis, the Kreb cycle, and the electron transport chain & chemiosmosis
Cellular respiration equation C6H12O6 + 6O2 ---> 6CO2 + 6H2O + ATP
Glycolysis anaerobic, occurs in the cytoplasm, breaks down glucose to make it pyruvat...
Bio 1050 Exam 3 Practice Questions and
Correct Answers
Cellular respiration ✅an aerobic process that produces ATP through glycolysis, the
Kreb cycle, and the electron transport chain & chemiosmosis
Glycolysis ✅anaerobic, occurs in the cytoplasm, breaks down glucose to make it
pyruvate
Products: 2pyruvate, 2ATP, 2NADH
Intermediate step of glycolysis ✅active transport carries 2pyruvate to the mitochondrial
matrix. There, pyruvate is oxidized to 2Acetyl coa
Products: CO2 released, 2NADH
Kreb cycle (citric acid cycle) ✅aerobic, occurs in the mitochondrial matrix (following the
intermediate step of glycolysis) - 2 cycles of this occur for each acetylcoa
Input: 2acetylcoa
Output: 2ATP, 6NADH, 2FADH2, 4CO2
Electron transport chain & chemiosmosis ✅occurs in the inner mitochondrial
membrane, FADH2 & NADH transfer electrons to protein complexes. These electrons
generate a proton gradient in the intermembrane space when fed through the protein
complexes.
ATP synthase ✅enzyme on the inner membrane, H+ ions are fed through from the
proton gradient. When these ions go through, they trigger the enzyme to turn ADP ->
ATP
Products: can produce ~26-34 ATP
Fermentation ✅a form of anaerobic respiration done via glycolysis, meaning that ATP
is created without the use of oxygen. The lack of oxygen means that there is no electron
transport chain
Alcoholic fermentation ✅a step is added to glycolysis to regenerate NAD+, which is
what allows glycolysis to keep repeating.
2pyruvate -> 2acetaldehyde -> 2ethanol (alcohol)
CO2 is released in the first transformation of pyruvate, NADH is oxidized to NAD+ when
ethanol is created.
Lactic acid fermentation ✅similar to alcoholic fermentation, a step is added to
glycolysis to regenerate NAD+ and keep it repeating.
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