Do plants have a citric acid cycle?
Do plants have a citric acid cycle?
Plant mitochondria have a fully operational tricarboxylic acid (TCA) cycle that plays a central role in generating ATP and providing carbon skeletons for a range of biosynthetic processes in both heterotrophic and photosynthetic tissues.
Where does the citric acid cycle occur in plant cells?
Explanation: The citric acid (Krebs) cycle takes place in the mitochondrial matrix. The Krebs cycle involves using acetyl-CoA as a substrate to produce high energy electron carriers and to later participate in electron transport, ultimately yielding .
Does the citric acid cycle occur in all organisms?
The Citric Acid Cycle: The citric acid cycle, or Krebs cycle, is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidization of acetate—derived from carbohydrates, fats, and proteins—into carbon dioxide.
What does citric acid cycle start with?
To start the cycle, an enzyme fuses acetyl CoA and oxaloacetate together so that citric acid is formed (a 2-carbon molecule + a 4-carbon molecule = a 6-carbon molecule!). This is the first molecule that is made in the cycle and is where the cycle gets its name.
Where does the citric acid cycle occur in prokaryotic cells?
In prokaryotic cells, the citric acid cycle occurs in the cytoplasm; in eukaryotic cells the citric acid cycle takes place in the matrix of the mitochondria.
What happens in citric acid cycle?
Figure: The citric acid cycle: In the citric acid cycle, the acetyl group from acetyl CoA is attached to a four-carbon oxaloacetate molecule to form a six-carbon citrate molecule. Through a series of steps, citrate is oxidized, releasing two carbon dioxide molecules for each acetyl group fed into the cycle.
Why is the citric acid cycle a cyclic pathway?
Why is the citric acid cycle a cyclic pathway rather than a linear pathway? It is easier to remove electrons and produce CO2 from compounds with three or more carbon atoms than from a two-carbon compound such as acetyl CoA.
What is the main purpose of the citric acid cycle?
Explanation: Although the citric acid cycle does synthesize two ATP per round, its main purpose is to produce NADH for the electron transport chain that makes ATP much more efficiently.
What happens during the citric acid cycle?
