题目
题目

APBIO142-030 with labs S17 - CollegeBoard* AP Exam Prep: Multiple Choice

单项选择题

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?

选项
A.Fireflies and tobacco plants are infected by the same kinds of bacteria.
B.Fireflies and tobacco plants share a recent common ancestor.
C.Most enzymes in fireflies have the same amino acid sequence as the enzymes in tobacco plants.
D.Transcription and translation are fundamen-tally similar in both fireflies and tobacco plants.
E.Chloroplasts can be made to produce light if firefly proteins are injected into plant cells.
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思路分析
The question asks about the basis for why a tobacco plant can be engineered to express a firefly gene and emit light. Option 1: 'Fireflies and tobacco plants are infected by the same kinds of bacteria.' This is incorrect because bioluminescence via firefly luciferase does not rely on bacterial infection; the light emission comes from the plant expressing the luciferase gene, not from bacteria. Option 2: 'Fireflies and tobacc......Login to view full explanation

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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?

In eukaryotes

Which statement about Transcription and Translation is unique for Prokaryotic cells?

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