Enzymes & their characteristics

What is a catalyst?

• speeds up the rate of a chemical reaction

• is chemically changed at the end of the reaction

• always has an active site

Which of the following statements about all enzymes is true?

• functions as a biological catalyst

• made up of proteins

• speed up the rate of chemical reactions

• are changed at the end of the reacction

Reactions that involve the building up of complex substances are also known as _______________ reactions?

Which of the following are characteristics of enzymes?

• lower activation energy of a reaction

• required in large amounts for a reaction

• lock and key hypothesis

• highly specific in their action

According to the lock - and - key hypothesis, the _______ is the lock and the ________ is the key

Identify the parts seen in step 1

• enzyme

• substrate

• active site

• product

Identify the structure in Step 2

• Lock-&-Key Complex

• Product

• Enzyme-product Complex

• Enzyme-Substrate Complex

Activation energy is _________________

All enzymes are catalysts but not all catalysts are enzymes

• True

• False