One of the factors required for the maturation of erythrocytes is 

1. vitamin - D

2. vitamin - A

3. vitamin - B₁₂

4. vitamin - C

A decrease in plasma albumin levels is likely to affect:

1. Clot formation

2. Oxygenation of hemoglobin

3. Osmotic balance

4. Immune functions

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?

(I)    They do not need to reproduce.

(II)   They are somatic cells.

(III)  They do not metabolise.

(IV)   Their internal space is available for oxygen transport.

CODES

(1)  Only (IV)

(2)  Only (I)

(3)  (I), (III) and (IV)

(4)  (II) and (III)

Serum differs from blood in 

(1) lacking globulins

(2) lacking albumins

(3) lacking clotting factors

(4) lacking antibodies

Which one of the following animals has two separate circulatory pathways?

1. Frog

2. Lizard

3. Whale

4. Shark

Which one of the following is correct?

1. Plasma = Blood - Lymphocytes

2. Serum = Blood + Fibrinogen

3. Lymph = Plasma + RBC + WBC

4. Blood = Plasma + RBC + WBC + Platelets

Erythrocyte maturing factor is

1. folic acid                     

2. cyanocobalamin

3. vitamin B₂                   

4. vitamin C

Which one of the following is a matching pair of a certain body feature and its

value/count in a normal human adult?

1. Urea -5-10 mg/100 ml of blood

2. Blood sugar (fasting) - 80-100 mg/100 ml

3. Total blood volume - 3 - 4 litres

4. ESR in Wintrobe method -9-15 mm in males and 20-34 mm in females

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