Class 11 Biology Body Fluids and Circulation MCQs with Answers

Class 11 Biology Body Fluids and Circulation MCQs with Answers provide a targeted and efficient study resource for Sainik School aspirants. Tailored to the class 11 biology syllabus, these multiple-choice questions focus on the crucial topic of body fluids and circulation. Clear and concise answers facilitate effective self-assessment, helping students identify their strengths and areas for improvement. A thorough understanding of this subject is essential for success in Sainik School entrance exams.

As students prepare for Sainik School admissions, engaging with these MCQs not only enhances exam readiness but also sharpens analytical and problem-solving skills. The content aligns with the broader goals of Sainik School education, emphasizing a holistic understanding of biology principles. This resource serves as a strategic tool, aiding students in building a strong foundation for future academic endeavors and meeting the specific requirements of Sainik School examinations.

Q1. Pacemaker of heart is:

1. AV node.
2. Bundle of His.
3. SA node.
4. Purkinje fibres.

Q2. Which one of the following types of cells lack nucleus in humans?

1. Erythrocytes.
2. Neutrophils.
3. Eosinosphils.
4. Monocytes.

Q3. Which of the following is also called the pacemaker of the heart?

1. SA Node.
2. Bundle of His.
3. Purkinje fibres.
4. Mytral Valve.

Q4. In veins, values are present to check backward flow to blood flowing at:

1. Low pressure.
2. High pressure.
3. Atmospheric pressure.
4. None of these.

Q5. The thickening of walls of arteries is called.

1. Arthritis.
2. Atherosclerosis.
3. Aneurysm.
4. Both (a) and (c).

Q97. Erythroblastosis foetalis occurs when:

1. Father is Rh negative and mother is Rh positive.
2. Mother is Rh negative and father is Rh positive.
3. Both are Rh positive.

Q6. Damage to thymus in a child may lead to:

1. A reduction in haemoglobin content of blood.
2. A reduction in stem cell production.
3. Loss of antibody mediated immunity.
4. Loss of cell mediated immunity.

Q.7 A person with which blood group is the least worried person in terms of availability of blood for him in case of
emergency?

1. A
2. B
3. AB
4. O

Q8. Life span of human RBCs is:

1. 120 days.
2. 9 days.
3. 20 days.
4. 90 days.

Q9. Which of the following factors is known as Christmas factor?

1. Factor XII
2. Factor IX
3. Factor VIII
4. Factor IV

Q10. Oxygenated blood occurs in:

1. Pulmonary artery.
2. Right atrium.
3. Right ventricle.
4. Pulmonary vein.

Q11. Which one of the following blood cells is involved in antibody production?

1. B-Lymphocytes.
2. T-Lymphocytes.
3. RBCs.
4. Neutrophils.

Q13. The antibodies are:

1. Germs
2. Carbohydrates
3. Proteins
4. Lipids

Q14. Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes
without haemoglobin.
Supplementing his diet with which of the following, is likely to alleviate his symptoms?

1. Thiamine.
2. Folic acid and cobalamin.
3. Riboflavin.
4. Iron compounds.

Q15. Which one of the following is a correct matching pair?

1. Dup – Sudden opening of semilunar valves at the beginning of ventricular diastole.
2. Pulsation of the radial artery valves in the blood vessels.
3. Purkinje fibers – Initiation of the heart beat.
4. Lubb – Sharp closure of AV valves at the beginning of ventricular systole.