Which of the following cells do not contain nucleus?
- 1. Root hair cells
- 2. Red blood cells
- 3. Platelets
- 4. Monocytes
Select the correct answer using the code given below.
1 only
2 and 3 only
1, 2 and 4
2, 3 and 4
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2016
– Statement 2: Mature mammalian red blood cells (erythrocytes) are anucleated, meaning they lose their nucleus during maturation. This allows them to maximize the space available for hemoglobin, increasing oxygen-carrying capacity.
– Statement 3: Platelets (thrombocytes) are not complete cells but are small, irregular fragments of cytoplasm derived from megakaryocytes found in bone marrow. They lack a nucleus. They play a crucial role in blood clotting.
– Statement 4: Monocytes are a type of white blood cell (leukocyte) and are part of the immune system. They are large, mononuclear cells, meaning they *do* contain a prominent, often kidney-shaped or lobed nucleus.
– Therefore, among the given options, only red blood cells and platelets lack a nucleus.