1)To lower the energy barrier in a reaction, enzymes change the path of the reaction between the reactants and products by doing what?
Destabilizing the transition state by increasing the free energy to be used and lowering the activation energy
Releasing carbonic acid into the environment to stabilize the transition state and lowering the activation energy
Reduce the activation energy by stabilizing the transition state and decreasing its free energy
D.Supply heat to stabilize the reactants and lower the activation energy
The  of an enzyme is the portion of the enzyme that binds a substrate and converts it to a product
All chemical reactions require an input of energy to proceed known as the  to reach the transition state
Please find the answers below:
Answer 1: Choice C (The lower is the activation energy for an enzyme catalyzed reaction, more easily is the biological catalysis performed using an enzyme. Thus, all enzymes tend to decrease the activation energy to catalyze a reaction)
Answer 2: Active site, activation energy (active site represents the main catalytic site at which the substrate binds and undergoes catalysis. Further, activation energy is the minimum energy required for initiating a biological catalysis using an enzyme)
Answer 4: Enzymes (all enzymes are biologically protein in nature and are known as biological catalysts which alter the rate of reaction without getting consumed in it)
Answer 5: Choice C (Phototrophs are those plants which require energy from the sunlight in the form of photons to perform all biological functions such as carbon fixation)
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