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What happens to pyruvate if electron acceptor is absent and What happens if electron acceptor is present?
If an electron acceptor is absent, pyruvate undergoes fermentation, resulting in the production of lactate in animals or ethanol and carbon dioxide in yeast, allowing for the regeneration of NAD+ and enabling glycolysis to continue. In contrast, if an electron acceptor is present, pyruvate enters the mitochondria and is oxidized in the citric acid cycle (Krebs cycle), leading to the production of ATP, NADH, and FADH2 through aerobic respiration. This process is more efficient in energy production compared to fermentation.
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If the appropriate final electron acceptor is not present the pyruvate that was formed at the end of glycolysis is reduced.?
If the final electron acceptor is not present, pyruvate undergoes fermentation instead of entering the aerobic respiration pathway. This process involves the reduction of pyruvate to lactate in animals or to ethanol and carbon dioxide in yeast. This conversion regenerates NAD+, allowing glycolysis to continue producing ATP even in the absence of oxygen. Thus, while less efficient than aerobic respiration, fermentation provides a way to sustain energy production when oxygen is scarce.
Is oxygen present in aerobic respiration?
Yes. Oxygen is the last electron acceptor in the electron transport chain.
What element must be present for both steps of cellular respiration to occur?
Oxygen is the element that must be present for both steps of cellular respiration to occur. It acts as the final electron acceptor in the electron transport chain, allowing for the production of ATP through oxidative phosphorylation.
Does areboic respiration reqire oxygen to be present?
Yes, aerobic respiration requires oxygen to be present in order to produce ATP through the breakdown of glucose. Oxygen serves as the final electron acceptor in the electron transport chain, allowing for the efficient production of ATP.
What has to be present for Pyruvate to enter the mitochondria?
The mitochondrial membrane has special transporter proteins which are needed to transport pyruvate. This transport also requires ATP.
If the appropriate final electron acceptor is not present the pyruvate that was formed at the end of glycolysis is reduced.?
If the final electron acceptor is not present, pyruvate undergoes fermentation instead of entering the aerobic respiration pathway. This process involves the reduction of pyruvate to lactate in animals or to ethanol and carbon dioxide in yeast. This conversion regenerates NAD+, allowing glycolysis to continue producing ATP even in the absence of oxygen. Thus, while less efficient than aerobic respiration, fermentation provides a way to sustain energy production when oxygen is scarce.
Is oxygen present in aerobic respiration?
Yes. Oxygen is the last electron acceptor in the electron transport chain.
What happens when oxygen is present and includes glycolysis and Krebs cylcle and Electron transport?
In the presence of oxygen, glycolysis breaks down glucose to produce pyruvate which then enters the Krebs cycle. In the Krebs cycle, pyruvate is further broken down to produce ATP, NADH, and FADH2. These electron carriers then enter the electron transport chain where they donate electrons to generate more ATP through oxidative phosphorylation.
Why oxygen is needed for krab cycle?
Oxygen is the final electron acceptor in the electron transfer chain and therefore needs to be present in the Kreb's cycle. Without oxygen only anaerobic repiration will occur.
What element must be present for both steps of cellular respiration to occur?
Oxygen is the element that must be present for both steps of cellular respiration to occur. It acts as the final electron acceptor in the electron transport chain, allowing for the production of ATP through oxidative phosphorylation.
What 2 processes are involved in anaerobic respiration?
Anaerobic Respiration can occur in plant and animal cells, in the absence of oxygen.Animal CellsC6H12O6 (glucose) ---> 2 lactic acid + 2ATPPlant CellsC6H12O6 ---> ethanol + carbon dioxide + 2ATPThe two processes that occur are:1 - Glycolysis (occurs in the cytosol of cells): The glucose molecule is split into two pyruvate (3- carbon molecules). As a result, energy is released and forms 2 ATP molecules released as well as 2 loaded acceptor molecule called NADH.-(Since anaerobic respiration occurs in the absence of oxygen, it can no longer continue its journey to the Krebs Cycle and the Electron Transport Chain.)2 - Fermentation: The hydrogens from the 2 NADH molecules. In animals, The NADs will then reattach these hydrogens onto the middle carbon atom in the pyruvate (3- carbon) molecule. This produces 2 lactic acid molecules, for each pyruvate molecule. In comparison, in plants, ethanol and carbon dioxide is produced.
Does areboic respiration reqire oxygen to be present?
Yes, aerobic respiration requires oxygen to be present in order to produce ATP through the breakdown of glucose. Oxygen serves as the final electron acceptor in the electron transport chain, allowing for the efficient production of ATP.
What is present during aerobic respiration?
During aerobic respiration, oxygen is present as the final electron acceptor in the electron transport chain. This process occurs in the mitochondria and produces a large amount of ATP, the cell's main source of energy. Carbon dioxide and water are also produced as byproducts.
What is pyruvate converted into when oxygen is not present?
lactate
What is a Lewis base acid?
Lewis acid is an electron acceptor / Lewis base is an electron donor. It is helpful to use this definition of acid and base in (1) organic chemistry (2) also when there are no Hydrogens present in the molecule. BF3 is a Lewis acid it seeks out and can accept electrons.
What two parts of cellular respiration require oxygen?
The two parts of cellular respiration that require oxygen are the Krebs cycle (citric acid cycle) and the electron transport chain. Oxygen is the final electron acceptor in the electron transport chain, which is essential for the production of ATP.
What will happen to pyruvate if there is no oxide present?
their other organisms will die if no oxide
