Erythropoiesis starts in:-

1. kidney

2. liver

3. spleen

4. red bone marrow

What is the oxidation state of iron in haemoglobin?

(1)  Fe^-

(2)  Fe²⁺

(3)  Fe³⁺

(4)  Fe⁴⁺

Mature RBCs lose their ability for

(1) DNA replication

(2) Anaerobic respiration

(3) Aerobic respiration and DNA replication

(4) Aerobic respiration, DNA replication and RNA synthesizing machinery

Haemoglobin is

(1) an oxygen carrier in human blood

(2) a protein used as food supplement

(3) an oxygen scavenger in root nodules

(4) a plant protein with high lysine content

The transport of respiratory gases is taken care by which blood component?

(1) RBC

(2) WBC

(3) Platelets

(4) Fibrinogen

Hemoglobin in healthy individual:

(1) 12–20 g/10 mL of blood

(2) 12–14 g/100 mL of blood

(3) 12–30 g/10 mL of blood

(4) 12–14 g/10 mL of blood

Assertion   :       Total count of RBC comes out to be very low in polycythemia.

Reason      :       Number of erythrocytes get reduced in the condition of polycythemia.

There is no DNA in:

Globulins contained in human blood plasma are primarily involved in:

1. defence mechanisms of body

2. osmotic balance of body fluids

3. oxygen transport in the blood

4. clotting of blood

Which one of the following mammalian cells is not capable of metabolizing glucose to carbon dioxide aerobically?

1. White blood cells

2. Unsatiated muscle cells

3. Liver cells

4. Red blood cells