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Haemoglobin and Carbon dioxide transport

Quiz by PUTERI BALQIS BINTI MOHD ISHLI KM-Pensyarah

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10 questions
Show answers
  • Q1

    Which of the following does not describe haemoglobin?

    They has high affinity for oxygen when PO2 is low   

    They are quaternary level of protein

    They are conjugated protein

    They has high affinity for oxygen when PO2 is high

    20s
  • Q2
    What is the structural feature of hemoglobin that allows it to bind oxygen?
    Absence of any metal ions
    Presence of iron in the heme groups
    Presence of zinc in the heme groups
    Presence of sulfur in the polypeptide chains
    20s
  • Q3

    What is the most common form in which carbon dioxide is transported in the blood?

    Bound to haemoglobin

    Dissolved CO₂ in plasma

    As carbonic acid

    As Bicarbonate ions (HCO₃⁻)

    20s
  • Q4
    What effect does carbon dioxide have on hemoglobin's ability to bind oxygen?
    It decreases hemoglobin's affinity for oxygen
    It transforms hemoglobin into a different protein
    It has no effect on hemoglobin
    It increases hemoglobin's affinity for oxygen
    30s
  • Q5
    How many oxygen molecules can one hemoglobin molecule carry?
    Three oxygen molecules
    Two oxygen molecules
    Five oxygen molecules
    Four oxygen molecules
    20s
  • Q6

    What enzyme catalyzes the conversion of CO₂ and water into carbonic acid (H₂CO₃)?

    Catalase

    Carbonic anhydrase

    Haemoglobin

    Amylase

    20s
  • Q7

    In what form is carbon dioxide transported when bound to hemoglobin?

    Oxyhaemoglobin

    Carbaminohaemoglobin

    Carboxyhaemoglobin

    20s
  • Q8

    What happens to the majority of bicarbonate ions (HCO₃⁻) in the blood?

    They diffuse into plasma in exchange for chloride ions

    They bind to haemoglobin

    They are exhaled directly

    They bind to hemoglobin forming HHb

    30s
  • Q9

    Which of the following decreases the oxygen affinity of hemoglobin?

    Increase in carbon dioxide concentration

    Increase in pH

    Increase in oxygen concentration

    Decrease temperature

    30s
  • Q10

    The majority of bicarbonate ions (HCO₃⁻) produced in red blood cells are transported in the plasma. How do they exit the RBC?

    By active transport

    Through osmosis

    Via the chloride shift

    By binding to haemoglobin

    20s

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