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Questions and Answers
Which of the following events occurs during transcription? (Select all that apply)
Which of the following events occurs during transcription? (Select all that apply)
- Proteins are synthesized.
- A molecule of RNA is formed based on the sequence of nucleotides in DNA. (correct)
- DNA is replicated.
- RNA is degraded.
Which of the following is a correct statement about mRNA?
Which of the following is a correct statement about mRNA?
- mRNA moves from the nucleus to the cytoplasm following RNA processing. (correct)
- mRNA does not undergo any processing.
- mRNA remains in the nucleus throughout its life cycle.
- mRNA is synthesized from proteins.
Where does the site of translation occur?
Where does the site of translation occur?
Ribosomes in the cell cytoplasm.
Which one of the following does not play a role in translation?
Which one of the following does not play a role in translation?
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Which of the following does not occur during RNA processing?
Which of the following does not occur during RNA processing?
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Study Notes
Protein Synthesis Overview
- Transcription produces a molecule of RNA from a DNA template by aligning RNA nucleotides with their complementary DNA bases.
- RNA processing occurs in the nucleus, involving modifications before mRNA can function in protein synthesis.
mRNA Characteristics
- mRNA, after processing, exits the nucleus and enters the cytoplasm where it serves as a template for translation.
- This movement from the nucleus to the cytoplasm is crucial for the next step in protein synthesis.
Translation Process
- Translation takes place at ribosomes located in the cytoplasm, where mRNA is decoded to build proteins.
- Ribosomes are the essential machinery for synthesizing proteins from amino acid sequences.
Role of Various Molecules
- tRNA and ribosomes are integral to translation, while DNA is primarily involved in the transcription phase.
- Anticodons found on tRNA match with codons on mRNA, ensuring the correct amino acids are incorporated into the growing polypeptide chain.
RNA Processing Details
- RNA processing includes capping, polyadenylation, and splicing, which are essential steps prior to mRNA's role in translation.
- The attachment of mRNA to the ribosome marks the initiation of translation, not part of RNA processing itself.
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