Effects of Temperature on Enzyme Activity
Enzyme Activity
0 10 20 30 40 50 60
Temperature (°C)
Which is the MOST valid conclusion based on this graph?

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?