Question

an old dna strand is used as a ______ for the assembly of a new dna strand. source of nucleotides primer template complement model

Explanation:

In DNA replication, the old DNA strand serves as a template. Nucleotides pair with the template strand according to base - pairing rules (A - T, C - G) to assemble the new DNA strand. A primer is a short nucleic acid sequence that provides a starting point for DNA synthesis but is not the old DNA strand itself. The old strand is not just a source of nucleotides (new nucleotides are brought in), and "complement" and "model" are not the correct technical terms for its role in assembly.

Answer:

C. template