Which of the following events occurs during transcription?View Available Hint(s)for Part AThe message in mRNA is translated into a protein.Those segments of the RNA strand that do not actually code for the protein are removed.A molecule of RNA is formed based on the sequence of nucleotides in DNA.A cap is added to the RNA molecule.mRNA binds to a ribosome in the cytoplasm.
Question
Which of the following events occurs during transcription?View Available Hint(s)for Part AThe message in mRNA is translated into a protein.Those segments of the RNA strand that do not actually code for the protein are removed.A molecule of RNA is formed based on the sequence of nucleotides in DNA.A cap is added to the RNA molecule.mRNA binds to a ribosome in the cytoplasm.
Solution
During transcription, the following events occur:
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A molecule of RNA is formed based on the sequence of nucleotides in DNA: This is the primary function of transcription. The DNA sequence of a gene is transcribed into an RNA molecule by an enzyme called RNA polymerase. This RNA molecule then serves as a template for protein synthesis during the process of translation.
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Those segments of the RNA strand that do not actually code for the protein are removed: This process is known as RNA splicing. In eukaryotes, the initial RNA transcript, or pre-mRNA, often includes sequences, called introns, that do not code for protein. These introns are removed, and the coding sequences, or exons, are spliced together to form the mature mRNA.
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A cap is added to the RNA molecule: This process is known as capping. The 5' end of the new mRNA molecule is modified by the addition of a cap, which is a modified guanine nucleotide. This cap is important for the stability of the mRNA and its subsequent transportation out of the nucleus and into the cytoplasm.
The other two options are not events that occur during transcription:
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The message in mRNA is translated into a protein: This is a description of translation, not transcription. Translation is the process by which the sequence of the mRNA molecule is used to direct the synthesis of a protein.
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mRNA binds to a ribosome in the cytoplasm: This also describes an event during translation, not transcription. After the mRNA has been transcribed and processed, it is transported out of the nucleus and into the cytoplasm, where it binds to a ribosome to begin the process of translation.
Similar Questions
Which of the following does not occur during RNA processing?View Available Hint(s)for Part ESegments of RNA that do code for the protein are reconnected.Segments of the RNA strand that do not actually code for the protein are removed.Adenine nucleotides are added to the end of the RNA strand, forming a tail.mRNA attaches to the small subunit of a ribosome.A modified guanine nucleotide is added to the beginning of the RNA strand as a cap.
Transcription occurs in the ________. Translation occurs in the _________.
How is translation initiated?Group of answer choicesTwo ribosomal subunits bind to the mRNA transcript.DNA helicase binds to the origins of replication.RNA polymerase binds to the promoter sequence.Two ribosomal subunits bind to the DNA sequence.
Which of the following statements is TRUE regarding transcription and translation? *1 pointDuring protein synthesis, translation occurs prior to transcription.During transcription, an mRNA molecule is created from the DNA molecule.During translation, a DNA sequence is used to synthesize an amino acid sequence.Translation takes place in the nucleus, while transcription takes place in the cytoplasm.
Which of the following is a step in translation?Group of answer choicesActivation of amino acidsSynthesis of mRNAsSynthesis of an RNA primerBinding of DNA and RNA together
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