In the sperm heads, DNA is particularly highly condensed and there is presence of protamines. These protamines are small arginine-rich nuclear proteins. Which of the following protein is replaced by protamines in the sperm head?

Histone

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DNA polymerase

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Arginine

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Amines

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Solution

The correct option is A Histone
Protamines are small, arginine-rich, nuclear proteins.
They replace histones later in the spermatogenesis.
It is essential for sperm head condensation and DNA stabilization.
So, the correct option is 'Histones'.

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