A) Enzymes interact with specific substrates: True. Enzymes are highly specific and usually interact with a particular substrate to catalyze a reaction. This specificity is due to the unique shape of the enzyme’s active site, which matches only certain substrates.
B) Enzymes are lipids: False. Enzymes are proteins, which are made up of amino acids. While lipids play important roles in biological systems, they are not classified as enzymes.
C) Enzymes speed up chemical reactions: True. Enzymes act as catalysts to increase the rate of chemical reactions by lowering the activation energy required for the reaction to proceed.
D) One enzyme can be used for many different types of chemical reactions: False. Typically, an enzyme is specific to a particular reaction or type of substrate. Using the same enzyme for multiple types of reactions is generally not the case, as enzymes are designed to facilitate specific interactions.
E) Enzymes provide activation energy: False. Enzymes do not provide activation energy; rather, they lower the activation energy needed for a reaction to take place, making it easier for the reaction to occur.