题目内容

The reading direction of genetic codon is ( )

A. no directions
B. 3′→5′
C. 5′→3′
D. N terminus→C terminus

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The product of translation is ( ).

A. protein
B. DNA
C. RNA
D. dNTP

The RNA polymerase Ⅲ of eukaryotic cell catalizes the synthesis of ( ).

A. Pre-rRNA(45S-rRNA )
B. hnRNA
C. tRNA
D. miRNA

RNA polymerase Ⅰ of eukaryotic cell catalizes the synthesis of ( ).

A. Pre-rRNA(45S-rRNA )
B. hnRNA
C. tRNA
D. 5S-rRNA

Which vitamine is essential for methionine cycle?()

A. biotin
B. vitamine B12
C. vitamine B6
D. pyridoxal