NEET Biology Body Fluids and Circulation MCQs Set 17

Multiple Choice Questions (MCQs) for NEET Biology: Body Fluids and Circulation

Review structured MCQ sets for NEET Biology Body Fluids and Circulation. Built according to official NEET guidelines, these downloadable questions support daily revision and core concept reinforcement.

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Multiple Choice Questions

Question 1: The nucleus of granular WBCs is mainly:
(a) Spindle shaped
(b) Round
(c) Oval shaped
(d) Lobed
Show Answer & Explanation

Answer: (d) Lobed

Explanation:
1. Granulocytes (neutrophils, eosinophils, basophils) have lobed nuclei.

Teacher's Note:
1. Agranulocytes have rounded or kidney-shaped nuclei.

Question 2: Which WBC increases in allergy?
(a) Acidophil (eosinophil)
(b) Basophil
(c) Lymphocyte
(d) Neutrophil
Show Answer & Explanation

Answer: (a) Acidophil (eosinophil)

Explanation:
1. Eosinophils increase in allergic conditions and parasitic infections.

Teacher's Note:
1. Acidophil is another name for eosinophil.

Question 3: How many polypeptide chains are present in a single molecule of haemoglobin?
(a) 1
(b) 3
(c) 4
(d) 2
Show Answer & Explanation

Answer: (c) 4

Explanation:
1. Haemoglobin has four chains, two alpha and two beta.

Teacher's Note:
1. Each chain carries one haem group.

Question 4: Thromboplastin is secreted by:
(a) Kidney
(b) Platelets
(c) Leucocytes
(d) Erythrocytes
Show Answer & Explanation

Answer: (b) Platelets

Explanation:
1. Injured tissues and disintegrating platelets release thromboplastin.

Teacher's Note:
1. It starts the cascade of clotting.

Question 5: T lymphocytes differentiate in the:
(a) Bone marrow
(b) Liver
(c) Thymus gland
(d) Kidney
Show Answer & Explanation

Answer: (c) Thymus gland

Explanation:
1. T lymphocytes mature in the thymus, the T standing for thymus.

Teacher's Note:
1. B lymphocytes mature in bone marrow.

Question 6: Which blood group is a universal recipient?
(a) AB negative
(b) O negative
(c) O positive
(d) AB positive
Show Answer & Explanation

Answer: (d) AB positive

Explanation:
1. AB positive has no antibodies and no Rh antibodies, so it can receive from any group.

Teacher's Note:
1. The universal donor is O negative.

Question 7: Antibodies are absent in which blood group?
(a) A
(b) B
(c) AB
(d) O
Show Answer & Explanation

Answer: (c) AB

Explanation:
1. Group AB has A and B antigens and no anti-A or anti-B antibodies.

Teacher's Note:
1. Group O has both antibodies.

Question 8: Among the total WBCs, lymphocytes make up about:
(a) 60 to 65%
(b) 2 to 3%
(c) 6 to 8%
(d) 20 to 25%
Show Answer & Explanation

Answer: (d) 20 to 25%

Explanation:
1. Lymphocytes are 20 to 25% of leucocytes.

Teacher's Note:
1. Neutrophils form 60 to 65%.

Question 9: Agglutinins are present in:
(a) RBC
(b) WBC
(c) Serum
(d) Spleen
Show Answer & Explanation

Answer: (c) Serum

Explanation:
1. Agglutinins are the antibodies in the serum (plasma).

Teacher's Note:
1. Agglutinogens are the antigens on the RBC.

Question 10: Blood group A can receive blood from which groups?
(a) A, AB, O
(b) A, O
(c) O
(d) B, AB
Show Answer & Explanation

Answer: (b) A, O

Explanation:
1. A has anti-B antibodies and so receives only from A and O.

Teacher's Note:
1. It cannot take B or AB blood.

Question 11: Which of the following is NOT a plasma protein?
(a) Heparin
(b) Albumin
(c) Prothrombin
(d) Fibrinogen
Show Answer & Explanation

Answer: (a) Heparin

Explanation:
1. Heparin is a polysaccharide anticoagulant, not a plasma protein.

Teacher's Note:
1. Albumins, globulins and fibrinogen are the main plasma proteins.

Question 12: Megakaryocytes are the cells that:
(a) Produce RBCs
(b) Produce thrombocytes
(c) Produce WBCs
(d) Produce proteins
Show Answer & Explanation

Answer: (b) Produce thrombocytes

Explanation:
1. Megakaryocytes in bone marrow break into platelets.

Teacher's Note:
1. Platelets have no nucleus.

Question 13: A person with blood group B has the antibody:
(a) Anti-A
(b) Anti-B
(c) Both
(d) None
Show Answer & Explanation

Answer: (a) Anti-A

Explanation:
1. Blood group B has B antigens, so anti-A antibodies are present in the plasma.

Teacher's Note:
1. Antibodies are against the antigens which are absent.

Question 14: Basophils do NOT secrete:
(a) Prothrombin
(b) Heparin
(c) Histamine
(d) Serotonin
Show Answer & Explanation

Answer: (a) Prothrombin

Explanation:
1. Basophils secrete histamine, serotonin and heparin, but prothrombin is a liver plasma protein.

Teacher's Note:
1. Mast cells have similar functions.

Question 15: Erythroblastosis foetalis can occur in the pair:
(a) Rh+ male and Rh- female
(b) Rh- male and Rh- female
(c) Rh+ male and Rh+ female
(d) Rh- male and Rh+ female
Show Answer & Explanation

Answer: (a) Rh+ male and Rh- female

Explanation:
1. An Rh negative mother carrying an Rh positive foetus may form anti-Rh antibodies that destroy foetal RBCs in a later pregnancy.

Teacher's Note:
1. The Rh positive foetus gets its Rh factor from the father.

Question 16: Rh antibodies from an Rh-negative mother can leak into the blood of an Rh-positive foetus and destroy:
(a) Foetal RBCs
(b) Mother's RBCs
(c) Foetal WBCs
(d) Both foetal and maternal RBCs
Show Answer & Explanation

Answer: (a) Foetal RBCs

Explanation:
1. The antibodies cross the placenta and attack the foetal red cells.

Teacher's Note:
1. Anti-Rh injection after the first delivery prevents sensitisation.

Question 17: Which are the agranulocytes?
(a) Eosinophils and neutrophils
(b) Monocytes and lymphocytes
(c) Eosinophils and lymphocytes
(d) Lymphocytes and basophils
Show Answer & Explanation

Answer: (b) Monocytes and lymphocytes

Explanation:
1. Monocytes and lymphocytes lack visible cytoplasmic granules.

Teacher's Note:
1. Granulocytes are neutrophils, eosinophils, basophils.

Question 18: Platelets are a source of:
(a) Fibrinogen
(b) Calcium
(c) Thromboplastin
(d) Haemoglobin
Show Answer & Explanation

Answer: (c) Thromboplastin

Explanation:
1. Platelets release thromboplastin (and serotonin) in blood clotting.

Teacher's Note:
1. Fibrinogen is made in the liver.

Question 19: Which of the following is unrelated to blood coagulation?
(a) Fibrinogen
(b) Fibrin
(c) Bilirubin
(d) Calcium
Show Answer & Explanation

Answer: (c) Bilirubin

Explanation:
1. Bilirubin is a bile pigment from haemoglobin breakdown.

Teacher's Note:
1. Fibrinogen, fibrin and Ca2+ are involved in clotting.

Question 20: The major component of blood plasma is:
(a) Water
(b) Inorganic substances
(c) Organic substances
(d) Blood cells
Show Answer & Explanation

Answer: (a) Water

Explanation:
1. Plasma is about 90 to 92% water.

Teacher's Note:
1. Proteins form 6 to 8%.

Question 21: The maximum number of white blood corpuscles are:
(a) Basophils
(b) Neutrophils
(c) Monocytes
(d) Eosinophils
Show Answer & Explanation

Answer: (b) Neutrophils

Explanation:
1. Neutrophils form 60 to 65% of the total WBCs.

Teacher's Note:
1. The order of abundance: neutrophils, lymphocytes, monocytes, eosinophils, basophils.

Question 22: Which of the following is NOT a granulocyte?
(a) Lymphocyte
(b) Basophil
(c) Neutrophil
(d) Eosinophil
Show Answer & Explanation

Answer: (a) Lymphocyte

Explanation:
1. Lymphocytes are agranulocytes.

Teacher's Note:
1. Granulocytes have lobed nuclei.

Question 23: Which of the following are the largest corpuscles in human blood?
(a) Erythrocytes
(b) Monocytes
(c) Lymphocytes
(d) Basophils
Show Answer & Explanation

Answer: (b) Monocytes

Explanation:
1. Monocytes are the largest blood cells.

Teacher's Note:
1. Platelets are the smallest.

Question 24: Prothrombin, albumin and fibrinogen are synthesised by the:
(a) Pancreas
(b) Bone marrow
(c) Spleen
(d) Liver
Show Answer & Explanation

Answer: (d) Liver

Explanation:
1. The liver makes most plasma proteins including clotting factors.

Teacher's Note:
1. Vitamin K is needed in this synthesis.

Question 25: Which one is a factor for the maturation of erythrocytes?
(a) Vitamin B12
(b) Vitamin A
(c) Vitamin D
(d) Vitamin C
Show Answer & Explanation

Answer: (a) Vitamin B12

Explanation:
1. Vitamin B12 and folic acid are needed for maturation of RBCs.

Teacher's Note:
1. Deficiency causes pernicious or megaloblastic anaemia.

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Multiple Choice Questions (MCQs) for NEET Biology Body Fluids and Circulation

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FAQs

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