Which is the best definition of activation energy? the energy required to end a chemical reaction the energy required to bind a substrate to an active site the energy required to break the bonds of reactant molecules the energy required to re-form bonds in product molecules

Activation energy is the energy required to bind a substrate to an active site.

Further Explanation:

The chemical reaction is defined as a process, wherein the reactants convert into products. The reactions can either be slow or fast, which is completely dependent on the reaction rate. The reaction can be catalyzed by changing the activation energy or by producing binding energy in a chemical reaction.The rate of slow reaction can be enhanced by a catalyst, which does not get consumed during the chemical reaction. Substances that enhance the rate of reaction are known as a positive catalyst, whereas substances that lower the rate of reaction is known as a negative catalyst.  

The enzyme is the biocatalyst. It has high catalytic power (efficiency) as well as specificity.They are involved in both exergonic and endergonic reactions. Almost all the enzymes are proteins. They have a specific structure, function, and regulation mechanism. The activation energy is the minimum amount of energy needed to initiate a chemical reaction. The activation energy is the energy difference between reactants and the transition state for a reaction.

The enzymes increase the rate of metabolic reactions taking place in the body by lowering the activation energy and stabilizing the transition state. During this process, the enzymes carry the reactants is a particular orientation. The activation energy is required to bind the reactants (substrate) to the active site of the enzyme and it assists in attaining the transition state to obtain the intermediate product.

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Answer Details:

Grade: High School

Subject: Biology

Chapter: Enzyme kinetics

Keywords:

Enzymes, proteins, activation energy, transition state, catalyst, rate of reaction, reactant, substrate, product, specificity, catalytic power.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

the correct answer is d