Spot the false enzyme claim

Exercise and reference answers

Questions

1. False statement

   An enzyme changes the free energy change of a reaction

   Statements

   1. An enzyme lowers the activation energy of a reaction
   2. An enzyme changes the free energy change of a reaction
   3. An enzyme is unchanged once the reaction is over

2. False statement

   Anabolic pathways are exergonic

   Statements

   1. Catabolic pathways release stored energy
   2. Anabolic pathways need an energy input
   3. Anabolic pathways are exergonic

3. False statement

   Every vitamin acts as a cofactor

   Statements

   1. Every vitamin acts as a cofactor
   2. Cofactors are inorganic ions like iron and magnesium
   3. Coenzymes are organic helper molecules

4. False statement

   ATP is a very stable molecule

   Statements

   1. Hydrolysis of ATP releases free energy
   2. ATP is a very stable molecule
   3. ATP carries three phosphate groups

Instructions

Tap the one false statement in each set of three about enzymes, helpers and ATP.

Explanation