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Enzyme-a fun introduction
Added Sep 13, 2013
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enzyme play Professor just the other day small man swallowing a tire stick bigger than the size of his head and it got me to thinking how could he possibly digest all that in just a few hours all the steak is first chewed in the mouth into bits and pieces that fall into the stomach you might already know that the stomach contains a powerful acid that can dissolve even met but what you did not know is that this asset is not what Elton Lee breaks down the stake know it's very tiny and special molecule call the enzymes that do the job strangely these enzymes find the stomach acid a cozy place to work in Mom it's like small piranhas finishing up a whale in a sea of acid imagine what I could do with that mom well it doesn't work that way what do you mean it doesn't work that way I knew you were going to say that. doubt you need to know what exactly enzymes are and how they work whenever you're ready click next to continue what are enzymes they are proteins that speed up chemical reactions without them reactions can still but they would be too slow to support life there are many different types of enzymes and they come in all manner of shapes and sizes for a sample what you call the piranha enzyme is actually pepsin it is only found in the stomach and digests proteins and your there is amylase which breaks down starch in your cells alone or hundreds of enzymes that control your cell activity send them from invasions by microbes like bacteria and viruses no enzymes can appear very different they all share a few characteristics in common let's now take a look at what these are number one each has an active site this is the groove in the enzyme where the molecules they act on called substrates are captured and made to undergo a reaction streets are either broken apart for instance starch found in the bread that you eat is digested to form simple sugars called glucose that is then absorbed into the body glucose is used up as energy but when there's too much of it special and why is combine the glucose molecules together to form a giant molecule called glycogen which is then stored away in the liver and muscles for later use number two enzymes are very specific each enzyme can only bind to one type of substrate look at the case of lipase enzyme which breaks down fats molecules like glucose and proteins cannot fit into the active site of lipase fat cells can bind to the active site because they have the right shape this ability to act on just fat cells is very important for lipase lipase converts fats into energy now imagine what would happen if lipase can also convert proteins into neurochemicals for the brain to wishing well if you no longer need the extra energy from your storage of fat lipase will be deactivated but this means that lipase can longer produced precious neural chemicals for your brain and other words when you stop burning fats you end up damaging your brain to prevent such freaky scenarios from happening in our body enzymes must only act on one type of molecule number 3 enzymes are cycled enzymes are not altered by the reactions they speed up immediately after they finished one reaction they can act on a new substance this way only a small amount of enzyme is needed to speed up thousands of reactions
Uploaded by
Phuong Nguyen
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