Question

what is the nucleic acid that forms the structure of chromosomes and is found in the nucleus of eukaryotic cells?

Explanation:

Nucleic acids include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). In eukaryotic cells, chromosomes are mainly composed of DNA and proteins. DNA is located in the nucleus (also in mitochondria and chloroplasts, but chromosomes are in the nucleus). RNA has different types (mRNA, tRNA, rRNA etc.) and their main functions are related to protein synthesis etc. rather than being the main component of chromosomes in the nucleus for forming chromosome structure.

Answer:

DNA (deoxyribonucleic acid)