Biochemistry MCQ 001

1. pH reflects:
1. Free hydrogen ions concentration.
2. Concentration of hydroxyl anions.
3. Hydrogen ions concentration to hydroxyl anions concentration ratio.
4. Hydrogen ions partial pressure.
2. Which buffer system predominated inside cells?
1. Bicarbonate
2. Acetate
3. Protein
4. Phosphate
5. Haemoglobin
3. pK of a bicarbonate buffer is:
1.7,3
2.7,4
3.6,1
4.5,9
5.7,8
4. Through which mechanisms do kidneys take part in regulation of acid-base
balance?
1. Maintaining of pCO2
2. Bicarbonate ions reabsorption
3. Hydrogen ions excretion
4. Bicarbonate ions regeneration
5. Nonvolatile acids formation
5. Which enzyme in renal tubules catalyzes dissociation of carbonic acid?
1. Lactate Dehydrogenase
2. AST
3. ALT
4. Lipase
5. Carbonic Anhydrase
6. Which anticoagulant is used for determination of parameters of acid-base
balance?
1. Oxalate
2. Citrate
3. Heparin Li
4. Heparin-Na
5. EDTA
7. What are the main organs taking part in regulation of acid-base balance?
1. Lungs
2. Kidneys
3. Liver
4. Spleen
5. Small intestine
8. Acidosis is characterized by:
1. Increased blood pH
2. Increasing of blood hydroxyl anions concentration
3. Decreased blood pH
4. Increased hydrogen ions concentration in the blood
5. Decreased lactate blood level
9. Alkalosis is characterized by:
1. Decreased blood pH
2. Decreased blood hydroxyl anions concentration
3. Increased lactate blood level
4. Increased blood pH
5. Decreased hydrogen ions concentration in blood
10. Respiratory acidosis may develop due to:
1. Prolonged starvation
2. Pyelonephritis
3. Respiratory distress syndrome
4. Hepatitis
5. Hyperventilation