During striated muscle contraction, the a. actin and myosin become farther apart
b. Z-lines become farther apart
c. actin and myosin become closer together
d. Z-lines become closer together

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 organelle other than the nucleus houses dna in a eukaryotic cell?

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin