What protein involved in coagulation provides the activation for the final step in clotting? A) fibrin
B) thrombin
C) prothrombin activator
D) fibrinogen

Which of the following forest management practices is best for reestablishing areas of forest?

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.

The diagram shows a model of dna. which part of the dna molecule codes for the amino acid sequence in the protein?