题目
W25 BIOL D006B 01Y Cell & Molecular Biology Lecture Exam 1
单项选择题
Which of the following processes occurs in prokaryotes but not in eukaryotes?
选项
A.removing introns from pre-RNA
B.translation in the absence of a ribosome
C.translocation into the ER
D.simultaneous transcription and translation of the same mRNA
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标准答案
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思路分析
Assessing the question, we need to identify which process is specific to prokaryotes and not found in eukaryotes.
Option 1: 'removing introns from pre-RNA' — This is a hallmark of eukaryotic gene processing where introns are spliced out to produce mature mRNA. Prokaryo......Login to view full explanation登录即可查看完整答案
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类似问题
Question32 Which one of the following statements describes a key difference between transcription as it occurs in bacteria compared to eukaryotes? Select one alternative: Bacterial translation can start before transcription of the same gene has finished. Bacteria use three distinct RNA polymerases that synthesise different RNA types. In bacteria, synthesis of the RNA chain occurs in the 5′ → 3′ direction. Promoter regions are only found in bacterial operons. ResetMaximum marks: 1 Flag question undefined
Molecular biologists are studying the processes of transcription and translation and have found that they are very similar in prokaryotes and eukaryotes, as summarized in Table 1. Table 1. Comparison of Selected Features of Transcription and Translation Feature of Protein Synthesis Prokaryotes Eukaryotes Transcription RNA Polymerase Present Present mRNA Synthesized Synthesized Location Cytoplasm Nucleus Translation Large Ribosomal Subunit 50S 60S Small Ribosomal Subunit 30S 40S tRNA Present Present Location Cytoplasm Cytoplasm Based on the information in Table 1, which of the following best predicts a key difference in prokaryotes and eukaryotes with regard to transcription and translation?
A tobacco plant can be made to express a gene from fireflies, resulting in the emission of light. Which of the following is the basis for this phenomenon?
In eukaryotes
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