Put the 3 steps of cellular respiration in order from beginning to end.
a
Glycolysis, Kreb's Cycle, Electron Transport Chain
b
Electron Transport Chain, Glycolysis, Kreb's Cycle
c
Kreb's Cycle, Electron Transport Chain, Glycolysis
d
Calvin Cycle, Electron Transport Chain, Glycolysis
c. Kreb's Cycle, Electron Transport Chain, Glycolysis
The correct order is option c: Kreb's Cycle, Electron Transport Chain, Glycolysis.
To determine the correct order of the 3 steps of cellular respiration, we need to understand what each step involves. Here are the steps along with their brief explanations:
1. Glycolysis: This is the first step of cellular respiration. It takes place in the cytoplasm of the cell and involves breaking down glucose (a sugar molecule) into two molecules of pyruvate (a three-carbon compound), resulting in the production of a small amount of ATP (Adenosine triphosphate) and NADH (Nicotinamide adenine dinucleotide).
2. Kreb's Cycle (also known as the Citric Acid Cycle): This is the second step and takes place in the mitochondria of the cell. In this step, pyruvate (from glycolysis) is further broken down, creating ATP, NADH, and FADH2 (Flavin adenine dinucleotide).
3. Electron Transport Chain: The third and final step occurs in the inner membrane of the mitochondria. The NADH and FADH2 molecules generated in the previous steps are utilized to generate a large amount of ATP through a series of oxidation-reduction reactions. This process involves the transfer of electrons along a chain of molecules, resulting in the production of water as a byproduct.
Now that we understand what each step entails, let's identify the correct order:
From the given options:
a) Glycolysis, Kreb's Cycle, Electron Transport Chain
b) Electron Transport Chain, Glycolysis, Kreb's Cycle
c) Kreb's Cycle, Electron Transport Chain, Glycolysis
d) Calvin Cycle, Electron Transport Chain, Glycolysis
The correct order of the 3 steps of cellular respiration is option c) Kreb's Cycle, Electron Transport Chain, Glycolysis.