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.There was surprise expressed by many that the number of protein-coding sequences in the human genome was much smaller than had been expected.Which of the following statements would describe most of the rest of the DNA in the human genome?
A)"junk" DNA that serves no possible purpose
B)rRNA and tRNA coding sequences
C)DNA that is translated directly without being transcribed
D)non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function

Question

Quizplus · Accepted Answer

Most of the rest of the DNA in the human genome is non-protein-coding DNA that is transcribed into several kinds of small RNAs with biological function, such as regulatory RNAs and microRNAs. This non-coding DNA is now recognized as having important functions in gene regulation and other cellular processes. The term "junk" DNA is no longer accurate as it implies a lack of function.

At the Beginning of This Century There Was a General