QQuestionBiology
QuestionBiology
Which of the following best describes transcription?
Transcription is the replication of DNA molecules so that each cell will have the same DNA.
Transcription involves tRNA carrying amino acids to the ribosome.
Transcription is the conversion of a DNA code into an mRNA code.
Transcription is the interpretation of an mRNA code to build a protein.
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Answer
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Step 1:: Understand the problem and identify the options
The problem asks us to identify the best description of transcription from a list of options. Transcription is a fundamental process in molecular biology, so we should be familiar with its definition and the roles of various molecules involved.
Step 2:: Analyze the first option
Transcription is the replication of DNA molecules so that each cell will have the same DNA. This statement is incorrect because transcription does not involve the replication of DNA molecules. DNA replication is a separate process that creates identical copies of DNA molecules before cell division.
Step 3:: Analyze the second option
Transcription involves tRNA carrying amino acids to the ribosome. This statement is also incorrect because tRNA (transfer RNA) is not involved in transcription. tRNA plays a crucial role in translation, where it carries amino acids to the ribosome based on the information encoded in mRNA.
Step 4:: Analyze the third option
Transcription is the conversion of a DNA code into an mRNA code. This statement is correct. During transcription, the DNA code is read and used as a template to create an mRNA molecule with a corresponding sequence of nucleotides.
Step 5:: Analyze the fourth option
Transcription is the interpretation of an mRNA code to build a protein. This statement is incorrect because it describes translation, not transcription. In translation, the information encoded in mRNA is interpreted and used to build a protein.
Final Answer
Transcription is the conversion of a DNA code into an mRNA code.
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