THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mRNA, tRNA, and rRNA are transcribed
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RNA polymerase binds to the promotor
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a poly-A tail is added to the ends of the mRNA
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Transcription can begin as soon as translation has begun even alittle
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Detailed explanation-1: -Which of the following does not occur in prokaryotic gene expression, but does occur in eukaryotic gene expression? A base deletion near the start of a gene.
Detailed explanation-2: -Eukaryotic transcription occurs in the nucleus, while prokaryotic transcription occurs in the cytoplasm. Eukaryotes use transcription factor proteins in transcription, while prokaryotes use sigma factors. Simultaneous transcription and translation occur in prokaryotes but not eukaryotes.
Detailed explanation-3: -RNAs from eukaryotes undergo post-transcriptional modifications including: capping, polyadenylation, and splicing. These events do not occur in prokaryotes. mRNAs in prokaryotes tend to contain many different genes on a single mRNA meaning they are polycystronic.
Detailed explanation-4: -Which of the following occurs in prokaryotes but not in eukaryotes? Concurrent transcription and translation.
Detailed explanation-5: -Gene expression in prokaryotes is mostly regulated at the transcriptional level (some epigenetic and post-translational regulation is also present), whereas in eukaryotic cells, gene expression is regulated at the epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels.