The human genome contains nearly 21,000 protein-coding genes, and these genes make up only about 2 percent of the genome. In another word, 98 percent of the genomes are non-protein-coding DNA, what some people call () DNA.
A: the invalid
B: the mismatched
C: the junk
D: the inactivated
A: the invalid
B: the mismatched
C: the junk
D: the inactivated
举一反三
- The main idea of this article is about （）. A: unlocking genetic code B: the genes" discovery C: the great human genome D: the genes and the scientists
- Operator: ( ) A: An operator is a DNA region that is working with promoter for genes to express. B: An operator is a DNA region at 5’ of a gene for a repressor to bind to prevent gene expression. C: An operator is a repressor protein to help genes to express. D: An operator is a repressor protein to inhibit genes to express.
- A complete set of genes of a given species<br/>called ( ) A: genome B: gene C: DNA D: chromosome cDNA
- A DNA library is… A: An international storehouse of all DNA data that has been collected to date B: The entire genetic code of human beings from the human genome project C: All the plasmids in a bacteria D: All the genes in a bacteria E: A collection of cloned DNA pieces
- Which of the<br/>following statements about non-coding DNA is wrong? () A: DNA sequence of non-coding protein. B: DNA sequence of non-coding RNA and protein. C: DNA sequence participating in the regulation of gene expression, but<br/>not coding protein. D: Relate to genome protection.