Carbon Dioxide

The majority of CO2 transport is in the form of...

• hydrogen carbonate (bicarbonate)

• CO2 in solution

• carbaminohemoglobin

What enzyme is required for CO2 to be combined with water to make carbonic acid?

• Carbonic anhydrase

• Carbonase

• Carbonic acid

The ion found in the haem group is...

• Fe2+

• Mg2+

• CO2+

Oxygen saturated protein in the blood in the form of...

• oxyhaemoglobin

• haemoglobin

• carbaminohaemoglobin

What is the partial pressure of O2 at respiring tissues?

• High

• Low

What is the partial pressure of CO2 in the lungs?

• High

• Low

Which of the following is NOT the structure of haemoglobin?

• Each haemoglobin molecule contains 4 haem group

• Every each haem group in haemoglobin can bind with 4 molecule of oxygen

• Haemoglobin is a quaternary structure

• Each haemoglobin has 2 α-chain and 2 β-chain polypeptide subunits

Oxyhaemoglobin gives up O₂ when…

• CO₂ concentrations are high

• pH values are high

• Body temperature is lowered

• O₂ concentrations are higher

Tags

NGSS.HS-LS1-3

The acidity due to the accumulation of H⁺ in erythrocytes is buffered by...

• Haemoglobin

• Carbon dioxide

• Plasma proteins

• Oxygen

Carbonic anhydrase in the erythrocytes…

• Catalyzes the removal of oxygen from the erythrocytes

• Catalyzes the reaction of carbon dioxide with water to form carbonic acid

• Catalyzes the conversion of carbon dioxide into water

• Catalyzes the increase in blood pH