RRB NTPC Science Blood Questions 2025, Practice Questions

RRB NTPC Science Blood: Preparing for the RRB NTPC exam requires a strong understanding of basic science topics. One such important topic is blood. Many questions are asked from this chapter in the General Science section. Understand the RRB NTPC Science Blood topic in simple language. It focuses on clear facts and exam-oriented points. Even a young learner can understand these concepts easily.

This will help students revise important ideas related to blood. It will also support quick revision before exams. The explanations are short, clear, and direct.

Importance of Blood in Human Body

Blood is a very important part of the human body. It helps in carrying oxygen and nutrients. It also removes waste materials. Blood is part of the circulatory system, which connects all body parts. The circulatory system helps blood flow from the heart to the whole body.

In RRB NTPC Science Blood questions, the role of blood is often asked. Students should know why blood is needed for survival. Blood also helps in protecting the body from infections.

Also Read: RRB NTPC Selection Process

Blood as a Type of Tissue

Blood is a type of connective tissue. It is called fluid connective tissue. It is liquid in nature. It connects different organs of the body. This fact is very common in RRB NTPC Science Blood related MCQs.

Blood moves through blood vessels. It keeps organs connected and active. This point is often included in Blood science notes used for exam preparation.

Quantity of Blood in Human Body

An average human body contains several liters of blood. It forms a small percentage of body weight. This fact is easy but important. Many exams test this basic knowledge.

In RRB NTPC Science Blood questions, numerical facts are asked in a simple form. Students should remember average values clearly.

Main Components of Blood

Blood has two main parts. One is plasma. The other is blood cells. Plasma is the liquid part. Cells form the solid part. Plasma makes up more than half of blood. Blood cells include RBCs, WBCs, and platelets. These facts are part of blood components biology. Students must remember the names and basic roles. In RRB NTPC Science Blood, questions often ask to identify blood components.

Plasma and Its Role

Plasma is yellow in color. It contains water, proteins, and nutrients. It also has clotting factors. Fibrinogen is one such protein. When clotting factors are removed, plasma becomes serum. Serum does not clot. This is a direct question area in RRB NTPC Science Blood exams. These points are also covered in Blood science notes for quick revision.

Also Read: RRB NTPC Salary 

Red Blood Cells (RBCs)

RBCs are the most numerous blood cells. Their scientific name is erythrocytes. Their main job is oxygen transport. Hemoglobin is present inside RBCs. Hemoglobin contains iron. Iron binds oxygen. This helps oxygen reach body cells. In RRB NTPC Science Blood, RBC function questions are very common.

Formation and Destruction of RBCs

RBCs are formed in red bone marrow. This process is called hematopoiesis. In fetal life, RBCs form in the liver and spleen. RBCs are destroyed mainly in the spleen. The spleen is also called the blood bank. This fact is often tested in RRB NTPC Science Blood MCQs. These details are a key part of blood components biology.

White Blood Cells (WBCs) and Platelets

WBCs are also called leukocytes. They help fight infections. Platelets are called thrombocytes. They help in blood clotting. WBCs are fewer than RBCs. Platelets are smaller in size than RBCs. These size and number differences are simple but important. Such facts are included in RRB NTPC science blood topic lists.

Blood Clotting Process

Blood clotting prevents excess blood loss. It involves proteins like fibrinogen and fibrin. Calcium and Vitamin K also help in clotting.

Vitamin K is important for making clotting factors. Heparin prevents clotting. Heparin is a natural anticoagulant. Questions from RRB NTPC Science Blood often focus on clotting factors.

Blood Groups and Discovery

Blood groups were discovered by Karl Landsteiner. The ABO system includes A, B, AB, and O groups. Rh factor decides positive or negative blood group. Rh factor is based on D antigen. This knowledge is vital for blood transfusion. This topic appears regularly in RRB NTPC Science Blood exams.

Antigens and Antibodies

Antigens are present on RBCs. Antibodies are present in plasma. They work on lock and key principle. If the wrong blood is transfused, clumping occurs. This can be dangerous. Hence blood matching is important. This concept is part of RRB NTPC science blood syllabus.

Check: RRB NTPC Syllabus 

Blood pH and Special Facts

Blood pH is slightly basic. It is around 7.4. Even a small change can be harmful. Some body parts do not have blood supply. The cornea of the eye is one example. Such facts are often seen in RRB NTPC Science Blood one-liner questions.

Why This Topic Is Important for RRB NTPC

Questions from blood are easy and factual. They do not need long calculations. Regular revision using Blood science notes helps improve accuracy. Understanding blood components biology makes learning easier. The topic RRB NTPC science blood is repeated every year in exams. Blood is a scoring topic in General Science. Concepts are simple and direct. With clear understanding, students can solve questions easily.

Important MCQs on RRB NTPC Science Blood

The following multiple-choice questions are designed based on frequently asked exam concepts. Each question includes a clear explanation to help students understand the logic behind the correct answer and strengthen basic concepts.

Q1. Blood is classified as which type of tissue?

A. Muscular tissue
B. Nervous tissue
C. Fluid connective tissue
D. Epithelial tissue

Correct Answer: C

Explanation: Blood connects different organs by transporting oxygen, nutrients, and hormones. Since it is in liquid form, it is called fluid connective tissue. This concept is frequently asked in RRB NTPC Science Blood questions.

Q2. The liquid part of blood is called:

A. Serum
B. Plasma
C. Lymph
D. Platelets

Correct Answer: B

Explanation: Plasma is the liquid portion of blood. It contains water, proteins, nutrients, and clotting factors. Serum is formed only after clotting factors are removed. This distinction is important in Blood science notes.

Q3. Which blood cells carry oxygen?

A. WBC
B. Platelets
C. RBC
D. Plasma

Correct Answer: C

Explanation: Red Blood Cells (RBCs) carry oxygen from the lungs to body tissues. They contain hemoglobin, which binds oxygen. This is a basic concept in blood components biology.

Q4. Hemoglobin contains which mineral?

A. Calcium
B. Sodium
C. Iron
D. Potassium

Correct Answer: C

Explanation: Hemoglobin contains iron. Iron helps hemoglobin bind with oxygen. Without iron, oxygen transport becomes weak. This question is common in RRB NTPC science blood exams.

Q5. RBCs are formed in:

A. Liver
B. Spleen
C. Red bone marrow
D. Kidney

Correct Answer: C

Explanation: In adults, RBCs are produced in the red bone marrow. During the fetal stage, they are formed in the liver and spleen. Formation sites are important for RRB NTPC Science Blood preparation.

Q6. The spleen is known as:

A. Oxygen store
B. Blood bank
C. Nerve center
D. Digestive organ

Correct Answer: B

Explanation: The spleen stores and destroys old RBCs. Because of this function, it is called the blood bank of the body. This is a direct one-line question in exams.

Q7. Which vitamin helps in blood clotting?

A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K

Correct Answer: D

Explanation: Vitamin K helps in the formation of clotting factors. Without Vitamin K, blood clotting becomes slow. This fact is repeatedly asked in RRB NTPC Science Blood MCQs.

Q8. Heparin is related to:

A. Blood formation
B. Oxygen transport
C. Blood clotting prevention
D. Digestion

Correct Answer: C

Explanation: Heparin is a natural anticoagulant. It prevents blood from clotting inside blood vessels. It is important in medical treatment and exams.

Q9. Who discovered the ABO blood group system?

A. Darwin
B. Mendel
C. Karl Landsteiner
D. Watson

Correct Answer: C

Explanation: Karl Landsteiner discovered the ABO blood group system. His discovery made safe blood transfusion possible. This is a standard fact in RRB NTPC science blood syllabus.

Q10. Normal blood pH is:

A. 6.8
B. 7.0
C. 7.4
D. 8.2

Correct Answer: C

Explanation: Normal human blood pH is about 7.4. It is slightly basic. Even small changes in blood pH can affect body functions. This is a common factual question.