Question

Which genes do not code for proteins?

Answer 1

mostly all of the genes code proteins but eukaryotic DNA has a repeated sequence that doesn't encode for proteins.

Answer 2

Those would be the non-coding RNAs. These are genes that are transcribed into RNA, but it will stay as RNA and wont make proteins.

Examples:

transfer RNA (tRNA), ribosomal RNA (riRNA), small RNAs (snoRNAs), siRNAs (silencing RNAs), etc. They have functions, but as RNA, not as proteins.

Hope it helps!!