Medical MCQs

5099 MCQs  (Page 13 of 510)

Enzymes are classified according to_________________?
A. Action on substrate
B. Action of coenzymes
C. Nature of the enzymes
D. All of the above
The activity of this plasma enzyme is responsible virtually for all plasma cholesterol esters in humans_______________?
A. Lecithin cholesterol acyl transferase (lcat)
B. Pyrophospho mevalonate decarboxylase
C. Hmg coa reductase
D. Phospho mevalonate kinase
The enzyme that splits hydrogen peroxide into water and oxygen is_____________?
A. Cytochromes
B. Cytochrome p 450
C. Super oxide dismutase
D. Catalase
Serum alkaline phosphatase level increase in_______________?
A. Hypothyroidism
B. Carcinoma of prostate
C. Hyperparathyroidism
D. Myocardial infarction
Enzymes concerned with the citric acid cycle are found in______________?
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Non-particulate cytoplasm
The most common enzyme deficiency in man is___________?
A. Glucose 6 phosphate dehydrogenase
B. Glucose 6 phosphatase
C. Hexokinase
D. Glucose 1,6 diphosphatase
Coenzyme, in an enzymatic reaction usually functions to_____________?
A. Activate the substrate
B. Increase the active sites of apoenzyme
C. Enhance the specificity of apoenzyme
D. Accept one of the cleavage products