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What is the location of the Krebs cycle?
The Krebs cycle takes place in the mitochondria of eukaryotic cells. It is a series of chemical reactions that occur in the matrix of the mitochondria.
Where in the mitochondria is the proteins of the ETC located?
The proteins of the electron transport chain (ETC) are located in the inner mitochondrial membrane. This is where the series of complexes involved in electron transfer and ATP production are situated.
What are the 4 main stages of cellular respiration and where do they take place in a eukaryotic cell?
The 4 main stages of cellular respiration are glycolysis (in the cytoplasm), pyruvate oxidation (in the mitochondria), the citric acid cycle or Krebs cycle (in the mitochondria), and oxidative phosphorylation (in the inner mitochondrial membrane).
When glucose is catabolized under aerobic conditions will cross the mitochondrial wall and enter the Kreb's cycle?
Yes, when glucose is catabolized under aerobic conditions, it is converted to pyruvate through glycolysis in the cytoplasm. Pyruvate then enters the mitochondria where it is converted to acetyl-CoA, which enters the Krebs cycle to produce energy in the form of ATP through oxidative phosphorylation.
The inner mitochondrial membrane lacks cholesterol how does it solve the problem of regulating membrane fluidity?
The inner mitochondrial membrane utilizes a high proportion of cardiolipin, a unique phospholipid, which helps maintain membrane fluidity without the need for cholesterol. Cardiolipin is able to stabilize the structure of the membrane and regulate its fluidity without the presence of cholesterol.
What has to be present for Pyruvate to enter the mitochondria?
Pyruvate requires the enzyme pyruvate translocase and a mitochondrial membrane potential to enter the mitochondria where it can undergo further processing in the citric acid cycle.
Which compound cannot cross the inner membrane of mitochondria?
ATP, being a large hydrophilic molecule, cannot freely cross the inner membrane of mitochondria. It requires specific transporters, such as the adenine nucleotide translocase, for its entry into the mitochondrial matrix.
What process transport pyruvic acid across the mitochondrial membrane from a high concentration to low concentration?
Pyruvic acid is transported into the mitochondria through a carrier protein known as the mitochondrial pyruvate carrier (MPC). The MPC uses the energy stored in the proton gradient across the mitochondrial membrane to move pyruvate against its concentration gradient. This process helps maintain the flow of pyruvate from the cytoplasm into the mitochondria for further energy production through aerobic respiration.
What is the exact location of pyruvate oxidation in the mitochondrion?
Pyruvate oxidation takes place in the mitochondrial matrix. Here, pyruvate is converted into acetyl-CoA by the pyruvate dehydrogenase complex, which is a critical step in aerobic respiration.
Where is pyruvate metabolized?
pyruvate is converted into acetyl coA in the mitochondrial matrix
Does pyruvate oxidation occur in the cytoplasm?
No, pyruvate oxidation does not occur in the cytoplasm. It takes place in the mitochondria. Pyruvate produced in the cytoplasm during glycolysis is transported into the mitochondria for oxidation to acetyl-CoA.
Which stages of energy metabolism occur in which compartments of the mitochondrion?
Glycolysis occurs in the cytoplasm, followed by pyruvate entering the mitochondria for the TCA cycle in the mitochondrial matrix. Electron transport chain and oxidative phosphorylation take place in the inner mitochondrial membrane space.
What membrane do protons cross in the synthesis of ATP?
Protons cross the inner mitochondrial membrane during ATP synthesis in a process known as oxidative phosphorylation. This movement of protons creates a gradient that is used to drive the production of ATP by ATP synthase.
What molecule crosses the mitochondrial membrane?
Adenosine triphosphate (ATP) crosses the mitochondrial membrane to provide energy for cellular processes.
In-folds of mitochondrial membrane?
Cristae
What is the location of the Krebs cycle?
The Krebs cycle takes place in the mitochondria of eukaryotic cells. It is a series of chemical reactions that occur in the matrix of the mitochondria.
What are the ribbonlike folds on the inner lining of the mitochondrial membrane call?
The ribbon-like folds on the inner lining of the mitochondrial membrane are called cristae.
