Question

Which one of the following is true statements?

• A. Blood group '0' person does not have anti-A, anti-B antibodies in blood plasma
• B. Eosinophils resist the bacterial infection
• C. RBC contain carbonic anhydrase
• D. T-wave of normal ECG represents depolarization of ventricle

Answer 1

The correct option is C RBC contain carbonic anhydrase

Blood group O individual doesn't have either A or B antigen on the surface of their RBC and in their blood plasma anti-A and anti-B antibodies are present. Therefore an individual of the group O receive blood only from the group O individual but can donate blood to the individual of any ABO( i.e. A, B, AB, O). Eosinophil is a type of WBC. It fights against the parasitic infection and allergic reactions.
RBC contains an anhydrase enzyme, which catalyzes a reaction by converting Co₂ and H₂O into carbonic acid (H₂CO₃). An H₂CO₃ breakdown into a proton (H⁺) and a bicarbonate ion, which help in lowering the blood pH_.

T wave represents the repolarization of the ventricular myocardium.
So, the correct answer is ‘RBC contain carbonic anhydrase'.