Question

krebs cycle

1. pyruvate (aka pyruvic acid) enters the ______ with acetyl coa attached (hint: organelle).
2. the gas _________ (hint: coming off of the circle in 2 places) is given off as a waste product.
3. nadh takes electrons to an __________ transport system.
4. adp plus a phosphate (p) forms _________ (remember this gives the cell energy).
5. __________ is formed as a waste product (hint: made along with the atp).

Explanation:

1. The Krebs cycle occurs in the mitochondrial matrix, so pyruvate (with Acetyl CoA) enters the mitochondria.
2. Carbon dioxide ($CO_2$) is released at two steps of the Krebs cycle as a waste gas.
3. NADH carries electrons to the electron transport chain (system) for oxidative phosphorylation.
4. ADP is phosphorylated by adding a phosphate group to form ATP, the cell's energy currency.
5. Water ($H_2O$) is produced as a waste product alongside ATP during the final steps of cellular respiration linked to the Krebs cycle.

Answer:

1. Mitochondria
2. Carbon Dioxide (CO₂)
3. Electron
4. ATP (Adenosine Triphosphate)
5. Water (H₂O)