Which of the following terms is the least accurate way to describe the process of making new DNA?

Question

BlackTom AI · Accepted Answer

Translation refers to protein synthesis from mRNA, so it is the least accurate term for making new DNA.

1) Relevant knowledge points and concepts
- DNA replication is the process that makes new DNA molecules. Commonly used terms include synthesis (creating new molecules), elongation (the phase where DNA polymerase adds nucleotides to a growing strand), and extension (used for growth of the DNA strand, e.g., the extension step in PCR and general chain extension). 
- Translation is the process in the central dogma by which ribosomes read mRNA to assemble amino acids into a polypeptide (protein), not a process that produces DNA.

2) Step-by-step reasoning
- Start by matching each option to the biology process it names:
  a. Synthesis — a general term meaning production of a new compound; "DNA synthesis" is a standard synonym for DNA replication.
  b. Translation — specifically the conversion of mRNA sequence information into a protein sequence.
  c. Elongation — a named stage of DNA replication (and also transcription) where polymerases add nucleotides, directly describing growth of DNA strands.
  d. Extension — commonly used for the growth of DNA chains; used in molecular biology (PCR extension step) and as a descriptor of strand extension during replication.
- Only option b names a process that does not produce DNA. It produces proteins from RNA.

3) Intermediate steps / examples
- Example: DNA replication = initiation (origin opening) → elongation (DNA polymerase adds dNTPs, synthesizing new strand) → termination. This is correctly called DNA synthesis/replication/elongation/extension.
- Example: Translation = ribosome reads codons on mRNA → tRNAs bring amino acids → polypeptide forms; no DNA is made.

4) Why the correct answer is correct
- Because translation is the process of making proteins, not making DNA, it is the least accurate descriptor for creating new DNA. The other terms directly describe making or lengthening DNA strands.

5) Why other options are incorrect
- a. Synthesis — accurate: "DNA synthesis" is standard terminology.
- c. Elongation — accurate: elongation is the polymerase-driven addition of nucleotides during replication.
- d. Extension — accurate: used to describe strand extension and is standard in PCR and replication contexts.

6) Conclusion
- Therefore, the least accurate term is b. Translation, which matches the provided correct answer.

Which of the following terms is the least accurate way to describe the process of making new DNA?单项选择题

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