Which one of the following vitamins is anti-haemorrhagic?

(1) Vitamin B₁₂               

(2) Vitamin B₅

(3) Vitamin C                   

(4) Vitamin K

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

The given figure shows schematic plan of blood circulation in humans with labels A to D. Identify the labels along with their functions and select the correct option.

(1) C - Vena Cava - takes blood from body parts to right atrium, P_CO2 = 45 mm Hg

(2) D - Dorsal aorta - takes blood from heart to body parts, P_O2 = 95 mm Hg

(3) A - Pulmonary vein - takes impure blood from body parts to heart, P_O2 = 60 mm Hg

(4) B - Pulmonary artery - takes blood from heart to lungs, P_O2 = 90 mm Hg.

After examining the blood groups of husband and wife, the doctor advised them not to have more than one child. The blood groups of the couple are likely to be

(1)  Male Rh^- and Female Rh⁺

(2)  Male Rh⁺ and Female Rh⁺

(3)  Male Rh⁺ and Female Rh^-

(4)  Male Rh^- and Female Rh^-

Which of the following human organs is called the 'graveyard of RBCs?
(1) Gall bladder

(2) Kidney

(3) Spleen 

(4) Liver

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

Which of the following matches correctly?

(1) Factor II - Thromboplastin

(2) Factor III - Prothrombin

(3) Factor VIII - Antihaemophilic globulin

(4) Factor XII - Haemophilic

Which of the following matches correctly?

(1) Inferior vena cava - Receives deoxygenated blood from the head and body

(2) Superior vena cava - Receives deoxygenated blood from the lower body and organs

(3) Pulmonary artery - Carries deoxygenated blood to the lungs

(4) Hepatic artery - Carries deoxygenated blood to the gut

The thread like tendons of papillary muscles inserted upon the flaps of tricuspid and bicuspid valves are

(1) chordae tendinae

(2) yellow elastin fibres

(3) reticulate fibres

(4) collagen fibres

Serum is-

(1) Blood $-$ corpuscles

(2) Blood $-$ corpuscles $-$ clotting factors

(3) Plasma $-$ clotting factors

(4) Both (2) and (3)