Question

The hemoglobin content per 100ml of blood is,
A.12-16g
B.25-30g
C.17-20g
D.5-11g

Answer 1

Hint: Hemoglobin is a protein present in the red blood cells that carries oxygen to the organs of the body and tissues and then transports carbon dioxide back to the lungs from various organs of the body. Hemoglobin is made up of four protein molecules connected together.

Complete answer:
Hemoglobin in blood carries oxygen from the lungs or gills to the rest of the body mainly in tissues. Here it releases the oxygen to allow aerobic respiration to provide energy to power the functions of the organism in the process called metabolism. A healthy individual has 12-20g of hemoglobin in every 100ml of blood.
Hemoglobin is involved in the exchange and transport of other gases. It transports carbon dioxide as carbaminohemoglobin where the carbon dioxide molecule is bound to the heme protein. The molecule also carries the important regulatory molecule nitric oxide which is then bound to a globin protein thiol group, and with oxygen it gets released.
Haemoglobin is also found to be situated outside the red blood cells. Many invertebrates, fungi and plants are there which contain haemoglobin and haemoglobin-like structure.
A variant of the molecule, termed as leghaemoglobin which is used in scavenging oxygen away from anaerobic systems, for example nitrogen fixing nodules of leguminous plants.

Hence the correct answer is OPTION(A)

Note: Hemoglobinemia is a medical term used for a condition in which there is an excess of hemoglobin in the blood plasma. This can be said to be an effect of intravascular hemolysis, where hemoglobin gets separated from the red blood cells which is a form of anemia.