What stage of catabolism involves the conversion of small molecules to CO2, H2 O, and energy for

step 1 Okay, in order to solve this question, let's talk about catabolism. Catabolism occurs when our c

What stage of catabolism involves the conversion of small...

Key Concepts

Electron Transport Chain and Oxidative Phosphorylation

This stage involves the transfer of electrons through a series of protein complexes located in the inner mitochondrial membrane. The energy released during these transfers is used to pump protons across the membrane, creating a gradient that drives the synthesis of ATP, while oxygen acts as the final electron acceptor to form water.

Citric Acid Cycle

Also known as the Krebs or TCA cycle, this is a central metabolic pathway where acetyl-CoA is oxidized to produce carbon dioxide. In the process, high?energy electron carriers such as NADH and FADH2 are generated, setting the stage for ATP production in subsequent steps.

Cellular Respiration

This is the overall metabolic process in which cells extract energy from nutrients by completely oxidizing them, typically transforming small organic molecules into carbon dioxide, water, and ATP. It encompasses a series of sequential stages that efficiently harness energy stored within chemical bonds.

Transcript

00:01 Okay, in order to solve this question, let's talk about catabolism.

00:03 Catabolism occurs when our cells or our body in general break down large molecules into small molecules.

00:15 And this is the opposite to anabolism that consists in breaking or, well, in building of large molecules from smaller molecule, practically.

00:26 Catabolism has three stages.

00:29 Stage 1 is called digestion, where practically all wheat are going to be digested and practically reduced to their most basic form.

00:46 For example, in case of proteins, they are going to be converted or digested to amino acids.

00:53 In case of carbs, they are going to be converted into monosaccharides, okay, like glucose, galactose, and photos.

01:03 Okay.

01:03 This is stage one.

01:05 Stage two of catabolism is called the release or involves the release of energy.

01:15 Once these small molecules are going to be like produced, they are going to be absorbed into the blood and they are going to be taken up by the cells and converted to even smaller molecules.

01:31 Okay, for example, they can be converted to acetyl coi.

01:36 Okay, which is going to to release some atp, some energy.

01:41 Remember that, for example, glucose is going to enter the glycolysis pathway, where it is going to produce two pyruid molecules and then each pyruid is going to convert to be converted into acetyl co -a.

01:53 Okay, there is going to be some production of atp here.

01:57 And finally, stage three, stage three involves the process of energy stored.

02:08 Okay.

02:09 And what is this process? well, practically, the release energy is going to be stored by reducing the co -enzyme nicotine amicotinamide, adenuclotide, it means this, into an avbh...

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