BIOL 2402 UNIT 3 LECTURE EXAM CH. 25 METABOLISM & ENERGETICS
UPDATED QUESTIONS AND ANSWERS
1. Define metabolism. - CORRECT ANSWER✅✅the sum of all biochemical processes under way within
the human body; it includes anabolism and catabolism.
2. Define catabolism. - CORRECT ANSWER✅✅the breakdown of organic molecules into simpler
components, accompanied by the release of energy
3. Define anabolism. - CORRECT ANSWER✅✅the synthesis of new organic molecules from simpler
components, and it requires energy
4. What materials are required to begin glycolysis? - CORRECT ANSWER✅✅glucose molecules
appropriate cytosolic enzymes
ATP & ADP
NAD; a coenzyme that removes hydrogen atoms
5. How many ATP are invested in glycolysis? - CORRECT ANSWER✅✅-2
+2
+2
= +2 Net Gain
6. Lysis of fructose-1,6-bisphosphate yields:
___________________________________________________________ and
___________________________________________________________ - CORRECT
ANSWER✅✅glyceraldehyde 3-phosphate and dihydroxyacetone phosphate 5
7. What is the fate of dihydroxyacetone-phosphate (DHAP) in glycolysis? - CORRECT ANSWER✅✅It is
converted to glyceraldehyde 3-phosphate (G3P).
8. The addition of inorganic phosphate to glyceraldehyde-3-phosphate (G-3-P) requires that a hydrogen
atom be removed from G-3-P.
, What happens to the hydrogen atom? - CORRECT ANSWER✅✅the atoms are rearranged, releasing a
molecule of water H20
9. How many total ATP are produced in glycolysis? - CORRECT ANSWER✅✅4
10. How many net ATP are produced in glycolysis? - CORRECT ANSWER✅✅2
11. What is the final carbon product in glycolysis? - CORRECT ANSWER✅✅2 three-carbon molecules of
pyruvate
12. Is glycolysis an aerobic or anaerobic process?
Explain your answer. - CORRECT ANSWER✅✅Anaerobic reaction, does not require oxygen
13. Where does glycolysis occur in a cell? - CORRECT ANSWER✅✅cytoplasm
14. For a cell containing the proper cellular structures and enzymes needed for cellular respiration; what
is the fate of pyruvate if oxygen is present? - CORRECT ANSWER✅✅mitochondria absorb the pyruvate;
pyruvic acid supplies energy to cells through the citric acid cycle (also known as the Krebs cycle) when
oxygen is present (aerobic respiration)
15. Pyruvate must be converted to ________________________________, which then enters the citric
acid cycle.
During the process a molecule of ____________________________ and ________________________
are produced. - CORRECT ANSWER✅✅acetyl Coenzyme A (acetyl CoA)
CO2 & NADH
16. The function of the citric acid cycle is to remove ________________________________________
atoms from organic molecules and transfer them to coenzymes (electron carriers). - CORRECT
ANSWER✅✅hydrogen
UPDATED QUESTIONS AND ANSWERS
1. Define metabolism. - CORRECT ANSWER✅✅the sum of all biochemical processes under way within
the human body; it includes anabolism and catabolism.
2. Define catabolism. - CORRECT ANSWER✅✅the breakdown of organic molecules into simpler
components, accompanied by the release of energy
3. Define anabolism. - CORRECT ANSWER✅✅the synthesis of new organic molecules from simpler
components, and it requires energy
4. What materials are required to begin glycolysis? - CORRECT ANSWER✅✅glucose molecules
appropriate cytosolic enzymes
ATP & ADP
NAD; a coenzyme that removes hydrogen atoms
5. How many ATP are invested in glycolysis? - CORRECT ANSWER✅✅-2
+2
+2
= +2 Net Gain
6. Lysis of fructose-1,6-bisphosphate yields:
___________________________________________________________ and
___________________________________________________________ - CORRECT
ANSWER✅✅glyceraldehyde 3-phosphate and dihydroxyacetone phosphate 5
7. What is the fate of dihydroxyacetone-phosphate (DHAP) in glycolysis? - CORRECT ANSWER✅✅It is
converted to glyceraldehyde 3-phosphate (G3P).
8. The addition of inorganic phosphate to glyceraldehyde-3-phosphate (G-3-P) requires that a hydrogen
atom be removed from G-3-P.
, What happens to the hydrogen atom? - CORRECT ANSWER✅✅the atoms are rearranged, releasing a
molecule of water H20
9. How many total ATP are produced in glycolysis? - CORRECT ANSWER✅✅4
10. How many net ATP are produced in glycolysis? - CORRECT ANSWER✅✅2
11. What is the final carbon product in glycolysis? - CORRECT ANSWER✅✅2 three-carbon molecules of
pyruvate
12. Is glycolysis an aerobic or anaerobic process?
Explain your answer. - CORRECT ANSWER✅✅Anaerobic reaction, does not require oxygen
13. Where does glycolysis occur in a cell? - CORRECT ANSWER✅✅cytoplasm
14. For a cell containing the proper cellular structures and enzymes needed for cellular respiration; what
is the fate of pyruvate if oxygen is present? - CORRECT ANSWER✅✅mitochondria absorb the pyruvate;
pyruvic acid supplies energy to cells through the citric acid cycle (also known as the Krebs cycle) when
oxygen is present (aerobic respiration)
15. Pyruvate must be converted to ________________________________, which then enters the citric
acid cycle.
During the process a molecule of ____________________________ and ________________________
are produced. - CORRECT ANSWER✅✅acetyl Coenzyme A (acetyl CoA)
CO2 & NADH
16. The function of the citric acid cycle is to remove ________________________________________
atoms from organic molecules and transfer them to coenzymes (electron carriers). - CORRECT
ANSWER✅✅hydrogen
