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Author Question: Which of the following does not describe the role that can be played by an enzyme in a biological ... (Read 34 times)

geodog55

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on: Aug 23, 2018
Which of the following does not describe the role that can be played by an enzyme in a biological reaction?
   
  1.It changes the mechanism of the reaction.
  2.It lowers the energy of a transition state.
  3.It changes the free-energy of the reaction.
  4.It changes the rate of the reaction.
  5.It increases the specificity of the reaction.

Question 2

In a radical chain reaction, what would be the best description of the following reaction?
   H3C + Cl  CH3Cl


  1.propagation
  2.elimination
  3.initiation
  4.termination
  5.substitution

Question 3

What is the role of the alkene in the reaction above?
 
  1.electrophile
  2.nucleophile
  3.free radical
  4.catalyst
  5.Lewis acid

Question 4

Which of the following statements is incorrect?
  1.Polar reactions must have ionic intermediates.
  2.Initiation in radical-chain reactions must generate species with unpaired electrons.
  3.Polar reactions occur between electrophiles and nucleophiles.
  4.Lewis bases generally behave as nucleophiles.
  5.Electrophiles can be neutral as well as positively charged.


joanwhite

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Reply #1 on: Aug 23, 2018
Answer to Question 1

3

Answer to Question 2

4

Answer to Question 3

2

Answer to Question 4

1


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