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Biochemistry: Part of A Series On

The document discusses metabolic pathways in biochemistry. It defines metabolic pathways as linked series of chemical reactions catalyzed by enzymes within a cell. Metabolites act as reactants, products, or intermediates and are passed between enzymes. Metabolic pathways occur in specific locations within eukaryotic cells based on their function, such as the electron transport chain in mitochondria or glycolysis in the cytosol. There are two main types of pathways - catabolic pathways that break down molecules and release energy, and anabolic pathways that use energy to synthesize molecules.

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68 views2 pages

Biochemistry: Part of A Series On

The document discusses metabolic pathways in biochemistry. It defines metabolic pathways as linked series of chemical reactions catalyzed by enzymes within a cell. Metabolites act as reactants, products, or intermediates and are passed between enzymes. Metabolic pathways occur in specific locations within eukaryotic cells based on their function, such as the electron transport chain in mitochondria or glycolysis in the cytosol. There are two main types of pathways - catabolic pathways that break down molecules and release energy, and anabolic pathways that use energy to synthesize molecules.

Uploaded by

Ana-Maria
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Part of a series on

Biochemistry

Key components

 Biomolecules
 Metabolism

 Index
 Outline

History of Biochemistry

 History

 Biochemistry
 Cell biology
 Bioinformatics
 Enzymology
 Genetics
 Immunology
 Molecular biology
 Plant biochemistry
 Structural biology

 Branches of biochemistry

 List of biochemists

Glossaries
 Glossary of biology
 Glossary of chemistry

Portals: Biochemistry

 v
 t
 e

In biochemistry, a metabolic pathway is a linked series of chemical reactions occurring within


a cell. The reactants, products, and intermediates of an enzymatic reaction are known
as metabolites, which are modified by a sequence of chemical reactions catalyzed by enzymes.
[1]:26
 In most cases of a metabolic pathway, the product of one enzyme acts as the substrate for
the next. However, side products are considered waste and removed from the cell. [2] These
enzymes often require dietary minerals, vitamins, and other cofactors to function.
Different metabolic pathways function based on the position within a eukaryotic cell and the
significance of the pathway in the given compartment of the cell. [3] For instance, the, electron
transport chain, and oxidative phosphorylation all take place in the mitochondrial membrane. [4]:73, 74
& 109
 In contrast, glycolysis, pentose phosphate pathway, and fatty acid biosynthesis all occur in
the cytosol of a cell.[5]:441–442
There are two types of metabolic pathways that are characterized by their ability to either
synthesize molecules with the utilization of energy (anabolic pathway) or break down of complex
molecules by releasing energy in the process (catabolic pathway).[6] The two pathways
complement each other in that the energy released from one is used up by the other. The
degradative process of a catabolic pathway provides the energy required to conduct a
biosynthesis of an anabolic pathway.[6]In addition to the two distinct metabolic pathways is the
amphibolic pathway, which can be either catabolic or anabolic based on the need for or the
availability of energy.[7]

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