Which explains how the Calvin cycle and the Krebs cycle differ?
A. The Calvin cycle uses ATP to make glucose.
B. The Krebs cycle uses ADP to make glucose.
C. Only the Calvin cycle occurs in plant cells.
D. The Krebs cycle only repeats in animal cells.

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.