12 Questions
Where does the citric acid cycle occur within a eukaryotic cell?
Matrix of the mitochondrion
What oxidizing agent is used to temporarily store high energy electrons harvested from glucose molecules in a series of gradual steps in the cytoplasm?
NAD+
Which of the following is converted to a different organic molecule during fermentation?
Pyruvate; reduced
What happens to the oxygen that is used in cellular respiration?
It is reduced to form water
Where does pyruvate oxidation occur in eukaryotic cells?
Mitochondria
What is the total amount of energy released during the Citric acid cycle?
2 ATP plus redox reactions have formed 6 NADH and 2 FADH2
What is the direct use of the energy released as electrons move along the electron transport chain?
To transport protons against their concentration gradient across the inner mitochondrial membrane
What is the oxidized form of the most common electron carrier needed for both glycolysis and the citric acid cycle?
NAD+
Why is the enzyme phosphofructokinase regulated by high levels of ATP?
To allow the substrate to be available for other reactions when the cell has ample energy
In bacterial cell division, the process where the cell divides into two nearly equal halves is called:
Binary fission
The DNA-wrapped histone structures that help fit the long DNA strands into the limited space of the nucleus are called:
Nucleosomes
If there are 32 sister chromatids in a normal somatic cell, what is the haploid number for that cell?
16
Test your knowledge on the Krebs cycle by answering questions related to the binding of acetyl CoA, formation of citrate, and the cellular location where the citric acid cycle occurs. Explore questions on energy release during the cycle.
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