Creatine kinase (CK) activity is used as an early indicator and the LDH activity is used as an delayed indicator of myocardial infarction. This difference in time of appearance in serum is influenced by
A) molecular mass
B) half-life of the enzyme in blood
C) association of the enzyme with cellular components
D) all of the above
E) none of the above

Question

Quizplus · Accepted Answer

Molecular mass, half-life of the enzyme in blood, and association of the enzyme with cellular components can all influence the time of appearance of an enzyme in serum. Therefore, the correct choice is D, "all of the above".

Creatine Kinase (CK) Activity Is Used as an Early Indicator