BIO 100 EXAM 2 COMPREHENSIVE TEST PAPER
QUESTIONS AND SOLUTIONS
◉ Cellular respiration requires ______ from breathing as part of the
metabolic process; ______ _______ waste is returned to the lungs.
Answer: oxygen; carbon dioxide
◉ Where does cellular respiration occur.
Answer: mitochondria
◉ stages of cellular respiration.
Answer: 1. glycolysis
2. citric acid cycle
3. electronic transport chain and ATP synthesis
◉ glycolysis.
Answer: 6-carbon glucose molecule is broken down into two 3-
carbon pyruvic acid molecules
◉ Where does glycolysis occur?.
Answer: cytosol/cytoplasm
,◉ Glycolysis produces how many ATP?.
Answer: 2 net ATP
◉ (T/F) Glycolysis requires oxygen..
Answer: False, glycolysis does not require oxygen.
◉ nicotinamide adenine dinucleotide (NAD+).
Answer: taxicab for electrons
- empty taxicab (NAD+) picks up electrons and hydrogen ions (H+)
- becomes full taxicab (NADH) that carries electrons to final
destination
◉ After glycolysis.
Answer: - pyruvic acid loses a carbon dioxide (decarboxylated)
- 2-carbon fragment is metabolized inside mitochondrion
◉ citric acid cycle (Krebs cycle).
Answer: series of enzyme -catalyzed reactions in the mitochondrial
(matrix
◉ citric acid cycle products.
Answer: carbon dioxide, NADH, and 2 ATP
, ◉ Where does the citric acid cycle occur?.
Answer: mitochondrial matrix
◉ electron transport and ATP synthesis.
Answer: As electrons, dropped off by NADH molecules generated
during glycolysis and the citric acid cycle, move through the proteins
of the electron transport chain, hydrogen ions are pumped into the
intermembrane space. Hydrogen ions flow back through an ATP
synthase protein, which converts ADP to ATP
◉ electron transport chain.
Answer: series of proteins in the mitochondrion acting like a
conveyor belt for electrons
◉ (T/F) Cells can run on protein and fat as well as on glucose..
Answer: True
◉ Cells can generate energy without oxygen through _________
___________..
Answer: anaerobic respiration
◉ During intense exercise.
QUESTIONS AND SOLUTIONS
◉ Cellular respiration requires ______ from breathing as part of the
metabolic process; ______ _______ waste is returned to the lungs.
Answer: oxygen; carbon dioxide
◉ Where does cellular respiration occur.
Answer: mitochondria
◉ stages of cellular respiration.
Answer: 1. glycolysis
2. citric acid cycle
3. electronic transport chain and ATP synthesis
◉ glycolysis.
Answer: 6-carbon glucose molecule is broken down into two 3-
carbon pyruvic acid molecules
◉ Where does glycolysis occur?.
Answer: cytosol/cytoplasm
,◉ Glycolysis produces how many ATP?.
Answer: 2 net ATP
◉ (T/F) Glycolysis requires oxygen..
Answer: False, glycolysis does not require oxygen.
◉ nicotinamide adenine dinucleotide (NAD+).
Answer: taxicab for electrons
- empty taxicab (NAD+) picks up electrons and hydrogen ions (H+)
- becomes full taxicab (NADH) that carries electrons to final
destination
◉ After glycolysis.
Answer: - pyruvic acid loses a carbon dioxide (decarboxylated)
- 2-carbon fragment is metabolized inside mitochondrion
◉ citric acid cycle (Krebs cycle).
Answer: series of enzyme -catalyzed reactions in the mitochondrial
(matrix
◉ citric acid cycle products.
Answer: carbon dioxide, NADH, and 2 ATP
, ◉ Where does the citric acid cycle occur?.
Answer: mitochondrial matrix
◉ electron transport and ATP synthesis.
Answer: As electrons, dropped off by NADH molecules generated
during glycolysis and the citric acid cycle, move through the proteins
of the electron transport chain, hydrogen ions are pumped into the
intermembrane space. Hydrogen ions flow back through an ATP
synthase protein, which converts ADP to ATP
◉ electron transport chain.
Answer: series of proteins in the mitochondrion acting like a
conveyor belt for electrons
◉ (T/F) Cells can run on protein and fat as well as on glucose..
Answer: True
◉ Cells can generate energy without oxygen through _________
___________..
Answer: anaerobic respiration
◉ During intense exercise.
