L$.$O$.8\mathrm{.}1.$ Define metabolism and provide examples of anabolic and catabolic reactions

Metabolism is defined as "the sum of all chemical reactions happening within the cells in the body". What do these chemical reactions do to nutrients consumed in food? There are two answers. Metabolic reactions can either break down molecules and release energy, or build up molecules and consume energy.$$

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$1.$ Break down & energy release$$

Catabolic reactions$$break down complex molecules into simpler ones, releasing energy at the same time.$$The energy released$$in catabolic reactions is temporarily stored$$in the form of ATPwhich is a small molecule that can readily give its energy to the different parts of the cell. One example of catabolic reaction is the breakdown of glycogen storage to produce glucose.

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$2.$ Build up & energy consumption

Anabolic reactions$$use the nutrients to build up the complex molecules that make up the cells or those used$$for energy storage. These reactions consume$$energy$,$ which means the use up available$$ATP molecules. One example of anabolic reaction is the build up of glycogen storage from individual glucose molecules.$$

Match the following processes with the type of reaction $($anabolic or catabolic$).$

Group of answer choices

Breaking down glucose to produce ATP

$[$ Choose $]$Anabolic$$Catabolic$$

Joining up glucose molecules to form glycogen, a large polysaccharide used as glucose storage

$[$ Choose $]$Anabolic$$Catabolic$$

Breaking down fats to produce ATP

$[$ Choose $]$Anabolic$$Catabolic$$

Breaking down protein present in muscle cells to produce free amino acids

$[$ Choose $]$Anabolic$$Catabolic$$

Using up amino acids from the amino acid pool to synthesize new proteins

$[$ Choose $]$Anabolic$$Catabolic$$

Store excess nutrients as fat

$[$ Choose $]$Anabolic$$Catabolic$$

Break down fat to produce energy

$[$ Choose $]$Anabolic$$Catabolic$$