A scientist observed a fungus and recorded what she saw:

• orange in color
• found on the surface of a leaf
• tightly arranged hyphae
• contains cell walls

The scientist most likely observed which fungus?

yeast, because it contains cell walls
rust, because it has tightly arranged hyphae
yeast, because it has tightly arranged hyphae
rust, because it contains cell walls

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.