Here's the breakdown of starting material and product in transcription:

Starting Material: DNA (deoxyribonucleic acid)

Product: RNA (ribonucleic acid)

Explanation:

* Transcription is the process where a gene's DNA sequence is copied into a messenger RNA (mRNA) molecule.

* The mRNA molecule then carries this genetic information to the ribosomes, where it's used to synthesize proteins.

In summary:

* DNA (the blueprint) is the starting material.

* RNA (the working copy) is the product of transcription.