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Question

The function of nucleolus is the synthesis of

A
DNA
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B
mRNA
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C
rRNA
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D
tRNA
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Solution

The correct option is C rRNA
DNA polymerase enzyme adds deribonucleotides to synthesize DNA using the base sequence of parental DNA strand in nucleus. Option A is incorrect. Primary transcript is synthesized by RNA polymerase during transcription in nucleus which undergoes processing to produce a functional mRNA. Option B is incorrect. Transfer RNAs are synthesized by transcription of tRNA gene in nucleus by by RNA polymerase; option D is incorrect. The darkly stained body in the nucleus is nucleolus which is involved in rRNA synthesis and ribosome construction. Correct option is C.

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