There are four principal classes of macronutrients: carbohydrate, protein, lipids and alcohol.
However...
There are three macronutrients required by humans: carbohydrates (sugar), lipids (fats), and proteins. Each of these macronutrients provides energy in the form of calories. For example: In carbohydrates, there are 4 calories per gram.
<span>The
correct answer is: by changing the three-dimensional conformation of the enzyme.</span>
Enzymes
like all the other proteins are shaped by interactions between their amino
acids and when those interactions change, the 3D structure of the enzyme
changes (tertiary structure). A change in shape will change the shape of the
active site and the substrate cannot bind.
Poop. I don't really know what you are asking but the excretory system removes the stuff from our stomach that we cant use or stuff that already has all of the nutrients that we need removed. Hope this helps
Activated partial thromboplastin
time (aPTT) is the blood test to monitor anticoagulation therapy for patients
taking heparin. The purpose of carrying out the Activated partial
thromboplastin time (aPTT) test is to find out if the right dose of heparin is
being used.
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