Question

Assertion-Anemic hypoxia is caused when a person is in heavy traffic for a long time.
Reason- Carbon monoxide has a higher affinity to hemoglobin than carbon dioxide and oxygen.
A. Both assertion and reason are correct and reason is the correct explanation for assertion.
B. Both assertion and reason are correct but reason is not the correct explanation for assertion.
C. Assertion is correct but the reason is incorrect.
D. Both assertion and reason are incorrect.

Answer 1

Hint: As we know that, hemoglobin is the component found in blood. It’s a color pigment which our RBC (red blood cells) contain. Hemoglobin binds to four oxygen molecules. It is the iron content in hemoglobin which gives blood, red color. Myoglobin is a monomeric protein whereas hemoglobin is an oxygen transport protein which is heterotetrameric. Myoglobin serves as an intracellular storage site for oxygen.

Complete answer:
Option A: Both assertion and reason are correct and reason is the correct explanation for assertion – Anemic hypoxia is the condition of lacking oxygen in staying at a particular place. Reason is that carbon monoxide binds to four units of hemoglobin.
Option A is the correct answer.
Option B: Both assertion and reason are correct but reason is not the correct explanation for assertion- in anemic hypoxia the hemoglobin constricts its size and becomes small, hence the capacity to carry oxygen or oxygen binding becomes low.
Option B is not the correct answer.
Option C: Assertion is correct but reason is incorrect- anemic hypoxia results in the oxygen binding low as a result the blood decreases and the person starts to feel uncomfortable, while the carbon monoxide shows its affinity towards hemoglobin. Hence both assertion and reason are true.
Option C is not the correct answer.
Option D: Both assertion and reason are incorrect- assertion and the reason are true to its statements and they correlate absolutely correct to each other.
So, option D is not the correct answer.

Hence, Option A is the correct answer.

Note:
Anemic hypoxia as we discussed, it is a blood defect which is caused by decreased ability of blood to carry out oxygen. The reasons behind such sickness are prolonged stay in traffic or altitude sickness, carbon-dioxide poisoning. Where the amount of carbon-monoxide increases in blood and oxygen level decreases. Factors which affect the affinity of hemoglobin for oxygen are- Partial pressure of carbon-dioxide- increased carbons. pH also matters in case of carbon-dioxide. Decreased pH known as acidosis shifts the curve to the right.