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 (a)   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

(a)  

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 (a)  

All enzymes are catalysts but not all catalysts are enzymes

• True

• False