Which of the following statements is true? a. The rate determining step is always the last step in a reaction mechanism. b. The stability/reactivity principle says that the more stable of two chemicals more reactive c. The reactivity/selectivity principle says that the more reactive of two chemi will be less selective. d. The activation barrier for a reaction is the difference in energy between reac and final products. Which of the following statements is FALSE? a. Optically active solutions always contain chiral molecules.
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
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Which of the following statements is true?
a. The rate determining step is always the last step in a reaction mechanism.
The stability/reactivity principle says that the more stable of two chemicals will be
b.
more reactive
c. The reactivity/selectivity principle says that the more reactive of two chemicals
will be less selective.
d. The activation barrier for a reaction is the difference in energy between reactants
and final products.
Which of the following statements is FALSE?
a. Optically active solutions always contain chiral molecules.
b. Two diastereomers always have identical melting points
c. Optically inactive solutions are either racemic or els contain no chiral chemicals
at all
d. A solution with 60% optical purity would have an 80/20 mix of enantiomers](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1ed6a947-2876-45a1-a822-b0a463f5f6f3%2F762d8ebe-3253-4627-8483-b0522dffbae8%2Ftq92u3n_processed.jpeg&w=3840&q=75)
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