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Standard XII
Biology
Question

DNA is not present in
  1. A nucleated ovum
  2. A mature spermatozoan
  3. Hair root
  4. Mature RBCs

A
A nucleated ovum
B
Mature RBCs
C
Hair root
D
A mature spermatozoan
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Solution
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The only cells which lack DNA are the mature red blood cells (erythrocytes). This is because they lack a nucleus, which is where the DNA is found in other cells. Red blood cells also lack mitochondria who themselves have DNA.

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