Cellular respiration is a vital process where cells extract energy from nutrients, with or without oxygen. It begins with glycolysis, followed by either fermentation or aerobic respiration's link reaction and Krebs cycle. These stages occur in the mitochondria, leading to ATP production, and are essential for cellular metabolism and energy generation.
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Cells use cellular respiration to extract energy from nutrients
Cellular respiration can occur with or without oxygen
Cellular respiration involves several stages, including glycolysis, the link reaction, the Krebs cycle, and oxidative phosphorylation
Glycolysis involves the conversion of glucose into two molecules of pyruvate
Glycolysis produces a small amount of ATP and NADH
In the absence of oxygen, cells can undergo anaerobic respiration through fermentation
The link reaction converts pyruvate into acetyl-CoA
During the link reaction, pyruvate is decarboxylated and oxidized
The link reaction produces acetyl-CoA and NADH, which are essential for the subsequent stages of cellular respiration
The Krebs cycle is a complex series of enzymatic reactions
The Krebs cycle oxidizes acetyl-CoA to produce energy carriers
The Krebs cycle generates NADH, FADH2, and GTP, which are important for energy production and other cellular processes
00
Cells obtain energy from nutrients through a vital process known as ______ ______.
Cellular
respiration
01
In the presence of oxygen, cells perform ______ ______, which includes the Krebs cycle and results in a high yield of ATP.
Aerobic
respiration
02
During ______, glucose is broken down into two pyruvate molecules in the cytoplasm, producing ATP and NADH.
Glycolysis
