Question

which process is part of transcription?
dna is copied to create a second dna strand.
mrna codons and trna anticodons assemble amino acids.
dna is unzipped with the aid of dna polymerase.
mrna is synthesized from a strand of dna.

Explanation:

Transcription is the process in which mRNA is synthesized from a DNA template strand. DNA replication involves creating a second DNA strand. Assembly of amino - acids by mRNA and tRNA is translation. DNA polymerase is mainly involved in DNA replication, not transcription.

Answer:

mRNA is synthesized from a strand of DNA.