Unit 2 Lesson 7
1) What is a chemical reaction?
A chemical reaction is a process that changes some chemical substances into other chemical substances.
2) What is cell respiration and what is its primary goal?
A cell respiration is the controlled release of energy from organic compounds in cells to form ATP. Its primary goal is to create energy that enables the transport of materials around a cell for metabolism.
3) Where does cell respiration take place?
Cell respiration takes place in both the cytoplasm (cytosol) and the mitochondria.
4) What are the three stages of cell respiration?
The three stages of cell respiration are glycolysis, the Krebs cycle, and the transporting of electrons.
4A) What is pyruvate and what is the net gain of what molecules during the first stage?
Pyruvate is two split molecules of glucose that have been split by enzymes. The net gain of the glucose molecules during the first stage is two.
4B) What does acetyl-COA have to do with pyruvate?
Acetyl-COA is combined with pyruvate molecules before the Krebs cycle begins.
4C) What is the net gain of what molecules during the second stage?
The net gain of ATP molecules during the second stage is two.
4D) How does the third stage work and what is the net gain of what molecules?
In the third stage, electron transport, energy from NADH and FADH2, which result from the Krebs cycle, is transferred to ATP. The net gain of ATP molecules is 30+.
A chemical reaction is a process that changes some chemical substances into other chemical substances.
2) What is cell respiration and what is its primary goal?
A cell respiration is the controlled release of energy from organic compounds in cells to form ATP. Its primary goal is to create energy that enables the transport of materials around a cell for metabolism.
3) Where does cell respiration take place?
Cell respiration takes place in both the cytoplasm (cytosol) and the mitochondria.
4) What are the three stages of cell respiration?
The three stages of cell respiration are glycolysis, the Krebs cycle, and the transporting of electrons.
4A) What is pyruvate and what is the net gain of what molecules during the first stage?
Pyruvate is two split molecules of glucose that have been split by enzymes. The net gain of the glucose molecules during the first stage is two.
4B) What does acetyl-COA have to do with pyruvate?
Acetyl-COA is combined with pyruvate molecules before the Krebs cycle begins.
4C) What is the net gain of what molecules during the second stage?
The net gain of ATP molecules during the second stage is two.
4D) How does the third stage work and what is the net gain of what molecules?
In the third stage, electron transport, energy from NADH and FADH2, which result from the Krebs cycle, is transferred to ATP. The net gain of ATP molecules is 30+.