★ Enzymes & Metabolism HL Quiz
What is the effect of temperature on enzyme activity?
A. Enzymes are not affected by temperature
B. Enzymes denature at extreme temperatures
C. High temperatures prevent enzyme reactions
D. Low temperatures speed up enzyme reactions
Select your answer:
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Circulatory System › ViewPulse rate measures …
A. How many times the heart beats per minute.
B. How many times the heart beats per second.
C. How many times the heart beats in a lifetime
D. Average number of times the heart beats per hour.
Coronary Heart Diseases › View
Bicuspid valve and tricuspid valves are closed during
A. Ventricular systole
B. Ventricular diastole
C. Atrial systole
D. Late joint diastole