<span>Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (especially mRNA) by the enzyme RNA polymerase. Both DNA and RNA are nucleic acids, which use base pairs of nucleotides as a complementary language.
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Carbs-Monosaccharide, Lipid-Triglycerides, Protein-Amino Acids, Nucleic Acids-Nucleotides!
I think this one is correct: C. You cannot view live specimens because the necessary preparation kills cells.
