Final answer:
The statement 'Most human nuclear DNA is coded to produce proteins' is False, as only a small fraction of human DNA directly codes for proteins, while the majority consists of non-coding sequences.
Step-by-step explanation:
Most human nuclear DNA is not coded to produce proteins; therefore, the statement is False. A significant portion of human DNA consists of non-coding regions, such as regulatory sequences, introns, and non-coding RNAs, with only a fraction directly coding for proteins. The human genome encodes over 20,000 genes, but not all DNA sequences are involved in the production of proteins. For instance, only about 1.5% of the genome consists of exons, which are the parts of the genome that are translated into proteins. The rest includes introns (non-coding regions within genes), regulatory sequences that control when and where genes are expressed, and vast stretches of DNA with unknown functions or that serve structural purposes in chromosomes.