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Hello.
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So the question is which statement is correct during transcription? and our options are rna polymerase unwinds dna.
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Option b, rna polymerase add one dna nucleotide at a time to growing dna.
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Option c, rna molecule synthesized in the 3 -prime to 5 -prime direction and option d all of the above.
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So let's start from the option c, rna molecule synthesized in 3 -prime to 5 -prime direction.
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Transcription rna molecule is not synthesized in 3 prime to 5 prime direction.
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It is synthesized in 5 prime to 3 prime direction.
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So this statement is not correct.
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This is false.
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And option b, rna polymerase add 1 dna nucleotide at a time to growing dna.
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This is also false.
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Because dna polymerase add 1 dna nucleotide at a time to growing dna.
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So this option option b is also false...