1) Which statement best describes how an enzyme lowers the activation energy of

Question

1) Which statement best describes how an enzyme lowers the activation energy of a reaction?

A) the enzyme chemically reacts with the substrate to make it more reactive B) the enzyme covalently binds to the substrate, lowering its energy C) the substrate is held in the correct orientation for reaction to occur D) the enzyme increases the temperature of the substrate, making it more reactive E) all of the above

Which of the following interactions holds the a-helix and the B-pleated sheet into its unique folding pattern? covalent bonding between cysteines CH2SH) hydrogen bonding between serines CH2OH) hydrogen bonding between nitrogens and oxygens in the amino acid backbone ionic bonding between acidic and basic amino acid side chains hydrophilic interactions

Explanation / Answer

1. B

Enzymes lower the activation energy by stabilising transition state.

Enzymes have following function:-

Holding substrates on its active site

Binding of enzymes to substrates

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