Oxygen binding to haemoglobin in blood is from Biology Breathing

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 Multiple Choice QuestionsMultiple Choice Questions

41.

During anaerobic conditions, the rate of glycolysis increases, is called

  • compensation point

  • extinction point

  • Warburg effect

  • Pasteur effect


42.

At high altitude, RBC's of human blood will

  • increase in number

  • decrease in number

  • decrease in size

  • increase in size


43.

The vital capacity of lungs is equal to

  • 4000 ml

  • 5000 ml

  • 6000 ml

  • 7000 ml


44.

Which of the following products are obtained by anaerobic respiration from yeast?

  • Alcohols

  • CO2

  • Beer and Wine

  • All of the above


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45.

What will be the number of Calvin cycles to generate one molecule of hexose?

  • 4

  • 6

  • 8

  • 9


46.

Hiccups can be best described as

  • forceful sudden expiration

  • forceful contraction of intercostal muscles during deep breathing

  • vibration of the soft palate during breathing while sleeping

  • jerky incomplete inspiration.


47.

Which part of the nephrons is impermeable to water

  • Proximal convoluted tubule

  • Distal convoluted tubule

  • Ascending limb of loop of Henle

  • Descending limb of loop of Henle


48.

The volume of 'anatomical dead space' air is normally

  • 230 mL

  • 210 mL

  • 190 mL

  • 150 mL


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49.

Assertion: Smoking causes oxygen deficiency in the body.

Reason: Carbon monoxide when inhaled while smoking, combines with haemoglobin to form chemically stable compound.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


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50.

Oxygen binding to haemoglobin in blood is

  • directly proportional to the concentration of CO2 in the medium

  • inversely proportional to the concentration of CO2 in the medium

  • directly proportional to the concentration of CO in the medium

  • independent of the concentration of CO in the medium


B.

inversely proportional to the concentration of CO2 in the medium

Bohr's effect is the phenomenon whereby the affinity of the respiratory pigment i.e., haemoglobin in the blood for oxygen is reduced when the level of carbon dioxide is increased. An increase in carbon dioxide concentration makes the blood more acidic which results in decrease in the efficiency of the uptake of oxygen by haemoglobin molecules. This facilitates gaseous exchange, because more oxygen is released in the tissues where the amount of carbon dioxide is rising due to metabolic activity. In its reverse, more oxygen is taken up at the lungs where the amount of carbon dioxide is low.


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