(8 points)
3. This graph shows the rates of reaction in a chemical reaction with and without the
addition of an enzyme.
Score
reaction
with enzyme
Rate of reaction
reaction
without enzyme
Concentration of substrate
Explain the shape of each line. What is happening to the reaction rate as the reactant concentration
is changed?
Explain what the enzyme appears to be doing.
Why does the curve of the reaction with enzyme flatten out?
•

What relationship exists between an enzyme and a catalyst?

Bridget is in science class. her teacher gives her two unknown substances and asks her to determine their relative ph. she places a piece of red litmus paper into both substances. the litmus paper turns purple when she places it into substance i. the litmus paper turns blue when she places it into substance ii. a. substance i is a neutral substance and substance ii is an acid. b. substance i is a neutral substance and substance ii is a base. c. substance i is an acid and substance ii is a base. d. substance i is a base and substance ii is a neutral substance.

Which of the following is true for a reliable scientific source? it cites logic. it cites opinions. it cites valid data. it cites common sense.