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Biology • Gene Expression • Original Scenario-Based • 1 questions

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Biology · Molecular Genetics · Biology · Gene Expression

1 Biology practice questions on Transcription. Questions built around original scenarios.

Questions

  1. 1.

    A bio-architect designs a luminescent synthetic cell, Chroma-9, that records environmental stress by transcribing synthetic DNA sentinel genes into messenger RNA transcripts. During an activation cycle, RNA polymerase attaches to the gene's promoter and reads the exposed template strand with the sequence 3′-TAC GGC TTA CGA-5′3'\text{-TAC GGC TTA CGA-}5'. Which RNA sequence will be produced from this template, and how is the nascent transcript elongated by the enzyme?

    • A) 3′-AUG CCG AAU GCU-5′3'\text{-AUG CCG AAU GCU-}5', elongated in the 3' to 5' direction using ribonucleotides.
    • B) 5′-ATG CCG AAT GCT-3′5'\text{-ATG CCG AAT GCT-}3', elongated in the 5' to 3' direction using deoxyribonucleotides.
    • C) 5′-UAC GGC UUA CGA-3′5'\text{-UAC GGC UUA CGA-}3', elongated in the 5' to 3' direction by directly substituting uracil into the template sequence.
    • D) 5′-AUG CCG AAU GCU-3′5'\text{-AUG CCG AAU GCU-}3', elongated in the 5' to 3' direction using ribonucleotides.