At the beginning of this century, there was a general announcement regarding the sequencing of the human genome and the genomes of many other multicellular eukaryotes. Many people were surprised that the number of protein-coding sequences was much smaller than they had expected. Which of the following types of DNA make up the rest of the human genome? A. DNA that is translated directly without being transcribed B. non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function C. non-protein-coding DNA that serves as binding sites for reverse transcriptase D. DNA that consists of histone coding sequences



Answer :

Non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function is the correct answer.

Numerous protein-coding and non-protein coding sequences can be found in the human genome. The sequences that can be translated into protein sequences are known as protein-coding sequences.

Although it was anticipated that these coding sequences would be larger when the genome was sequenced, the sequences turned out to be smaller. This demonstrates that non-coding sequences make up the majority of the genome.

These non-coding sequences are significant because, while they cannot be translated into proteins, they can be translated into a variety of RNA molecules, including regulatory RNA, ribosomal RNA, and others, through transcription.

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