What can a scientist do during an experiment so that others can repeat the experiment exactly the same way?
a. he should record the procedure steps but not the materials, tools, or amounts used.
b. he should write down numerical data only—the procedure steps are not important.
c. he should write down data and clear, step-by-step instructions as he goes along.

1. environmental factors, such as ph and temperature, can affect the function of an enzyme. a. true b. false 2. which of the following is an organic molecules (ex. vitamins) that an enzyme? a. coenzyme b. product c. active site d. substrate 3. how do enzymes effect the speed of a chemical reaction? a. they speed it up b. they slow it down c. they have no effect on the speed of a reaction 4. during a chemical reaction, an enzyme is used up so that it can only be used one time. a. true b. false 5. which of the following results from a chemical reaction that is catalyzed by an enzymes? a. active site b. product c. substrate d. coenzyme

What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above