Which part of human blood has no nucleus?

Last Updated: 26 Jun 2026

This question examines a fundamental concept of human anatomy, physiology, health, nutrition, disease, or body regulation that frequently appears in SSC CGL General Science. A reliable solution begins by identifying the organ, tissue, cell, hormone, nutrient, pathogen, or biological process named in the stem and then linking it with its precise function or defining feature. The human body works through coordinated organ systems. The digestive system processes food and absorbs nutrients; the respiratory system exchanges oxygen and carbon dioxide; the circulatory system transports gases, nutrients, hormones, and wastes; the excretory system maintains water, salt, and acid–base balance; the nervous and endocrine systems coordinate responses; and the skeletal, muscular, immune, and reproductive systems perform specialised roles.

AWhite blood cells

BPlatelets

CRed blood cells

DBoth RBC and Platelets

Correct Answer: Both RBC and PlateletsYour Answer: D

Explanation

call the exact source–function or deficiency–disorder pair and eliminate neighbouring concepts. Therefore option D, Both RBC and Platelets, is factually consistent with the stem, the marked correct index, and the explanation.✅ Correct Answer: D — Both RBC and Platelets Both Red Blood Cells (RBCs/Erythrocytes) and Platelets (Thrombocytes) lack nuclei in their mature form in humans. RBCs lose their nucleus during maturation to maximize space for haemoglobin and oxygen transport. Platelets are not cells but cell fragments from megakaryocytes, and they naturally have no nucleus. White blood cells (WBCs/Leukocytes) — WBCs DO have a nucleus; they use it for immune functions like producing antibodies. Platelets alone — While platelets lack nucleus, RBCs also lack nucleus, so D (both) is correct. Red blood cells alone — While RBCs lack nucleus, platelets also lack nucleus, so D (both) is correct. 📝 Important Note: Mature human RBCs and Platelets both lack a nucleus. WBCs have a nucleus.

Important Notes

this record is Both RBC and Platelets, corresponding to option D. The answer field, correct index, and both explanations must remain aligned.
Read the complete stem and identify the exact demand: organ, gland, hormone, cell, tissue, nutrient, enzyme, pathogen, vector, deficiency disease, body fluid, or physiological function.
Revise every structure with its location and principal function. For example, separate production from storage, transport from exchange, filtration from detoxification, and control from execution.
Learn nutrition facts as nutrient–source–function–deficiency pairs. Vitamins and minerals can have several roles, but SSC questions usually ask the best-known primary association.
White blood cells, Platelets, Red blood cells are eliminated here because none satisfies the precise requirement of the stem. Practising the reason for each rejection is more reliable than memorising only the correct choice.

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FAQ

SSC CGL Human Body FAQs

Common questions and clear answers for this topic.

Which body systems are most important for SSC CGL preparation?

The digestive, circulatory, nervous, and skeletal systems appear most frequently, along with sensory organs and basic endocrine functions.

How many bones are there in the human body, and is this commonly asked?

Yes, the human body has 206 bones, and questions about the largest, smallest, and total bone count appear fairly often.

What kind of blood-related questions come up in SSC CGL?

Questions usually cover blood group compatibility, the role of platelets in clotting, and basic facts about blood pressure and heart function.

Do I need detailed biochemistry knowledge for the human body section?

No, most questions focus on what each organ does and why, rather than the detailed biochemical processes behind it.

How can I retain human body facts more effectively for the exam?

Linking facts to real-life observations, like why pulse is checked at the wrist, makes them easier to recall than memorizing textbook lines.

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