Song and PowerPoint Video http://www.youtube.com/watch?v=uVmrf-B7slg
Cellular Respiration (Inquiry and Research)
1 What is a chemical reaction?
A chemical reaction is a process that changes some chemical substance into others. This happens in cellular respiration and photosynthesis by taking some molecules, such as glucose, and Oxygen, and creating other molecules such as CO2, water, and ATP.
2 What is cellular respiration?
Cellular Respiration is the process in which cells break down glucose and make ATP for energy.
3 Where does cellular respiration take place?
It takes place in the mitochondria. This is why the mitochondria are called the powerhouses of the cell. They make ATP for energy as that is their purpose.
4 What are the three stages of cell respiration?
The three stages are Glycolysis, the Krebs cycle, and electron transport. The first is where glucose is broken into two 3-carbon pyruvate molecules. The second is when pyruvate undergoes a series of reactions to produce two more molecules of ATP and some more of NADH and FADH2. The third is where the when NADH and FADH2 are used to make more ATP.
4a What is pyruvate and what is the net gain of molecules during the first stage?
Pyruvate is the output of glycolysis. Pyruvate is an organic acid and byproduct of glycolysis. During glycolysis, there is a net gain of two ATP molecules.
4b What does acetyl-CoA have to do with pyruvate?
Acetyl-CoA is the product of a reaction that involves CoA, and enzyme, and pyruvic acid. When the two are combined, they form Acetyl-CoA. Acetyl is a two-carbon molecule.
4c What is the net gain of what molecules during the second stage?
In the second stage, the Krebs cycle, two more ATP molecules are formed. Before the cycle, there were two more from glycolysis. At the end of the cycle, there are four total, and two net ATP molecules are gained in the second stage. There are 8 NADH molecules made in the cycle, and 2 FADH2 molecules made.
4d How does the third stage work and what is the net gain of what molecules?
Electron transport works by transferring NADH and FADH2 to ATP. NADH and FADH2 are hydrogen ions. The electron transport chains are on the inner membrane of the mitochondrion. As electrons with high energy are moved along the chain, some of the energy is captured. The energy captured is used to move the hydrogen ion across the inner membrane from the matrix to the intermembrane space. Because of the unequal distribution, the hydogen ions come back across the membrane and while doing so become ATP molecules. This final stage of cellular respiration can form as many as 34 more ATP molecules.
A chemical reaction is a process that changes some chemical substance into others. This happens in cellular respiration and photosynthesis by taking some molecules, such as glucose, and Oxygen, and creating other molecules such as CO2, water, and ATP.
2 What is cellular respiration?
Cellular Respiration is the process in which cells break down glucose and make ATP for energy.
3 Where does cellular respiration take place?
It takes place in the mitochondria. This is why the mitochondria are called the powerhouses of the cell. They make ATP for energy as that is their purpose.
4 What are the three stages of cell respiration?
The three stages are Glycolysis, the Krebs cycle, and electron transport. The first is where glucose is broken into two 3-carbon pyruvate molecules. The second is when pyruvate undergoes a series of reactions to produce two more molecules of ATP and some more of NADH and FADH2. The third is where the when NADH and FADH2 are used to make more ATP.
4a What is pyruvate and what is the net gain of molecules during the first stage?
Pyruvate is the output of glycolysis. Pyruvate is an organic acid and byproduct of glycolysis. During glycolysis, there is a net gain of two ATP molecules.
4b What does acetyl-CoA have to do with pyruvate?
Acetyl-CoA is the product of a reaction that involves CoA, and enzyme, and pyruvic acid. When the two are combined, they form Acetyl-CoA. Acetyl is a two-carbon molecule.
4c What is the net gain of what molecules during the second stage?
In the second stage, the Krebs cycle, two more ATP molecules are formed. Before the cycle, there were two more from glycolysis. At the end of the cycle, there are four total, and two net ATP molecules are gained in the second stage. There are 8 NADH molecules made in the cycle, and 2 FADH2 molecules made.
4d How does the third stage work and what is the net gain of what molecules?
Electron transport works by transferring NADH and FADH2 to ATP. NADH and FADH2 are hydrogen ions. The electron transport chains are on the inner membrane of the mitochondrion. As electrons with high energy are moved along the chain, some of the energy is captured. The energy captured is used to move the hydrogen ion across the inner membrane from the matrix to the intermembrane space. Because of the unequal distribution, the hydogen ions come back across the membrane and while doing so become ATP molecules. This final stage of cellular respiration can form as many as 34 more ATP molecules.