中国大学MOOC: A rare situation where only one of the two copies of a particular tumor-suppressor gene needs to be inactivated before there is a progression toward cancer is called:

The vaccine for measles is best characterized by() A: Bacteriocin B: Killed virus vaccine C: Inactivated virus vaccine D: Live virus vaccine E: Recombinant virus vaccine

At the end of each phase, the cyclin-Cdk complex in that phase is<br/>inactivated by() A: Multiple phosphorylations of cyclin B: De-phosphorylation of cyclin C: Oxidation of cyclin D: Degradation<br/>of cyclin by a proteosome

A rare situation where only one of the two copies of a particular tumor-suppressor gene needs to be inactivated before there is a progression toward cancer is called: A: haploinsufficiency. B: clonal evolution. C: loss of heterozygosity. D: signal transduction. E: aneuploidy.

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

Which of the following statements is right? A: RB exerts anti-proliferative effects by controlling the G1-to-S transition of the cell cycle B: RB is a key positive regulator of the cell cycle C: The TP53 was the first tumor suppressor gene to be discovered by the study of retinoblastoma D: Malignant transformation is only derived from one of the normal RB alleles inactivated

Parathion has which one of the following characteristics? ( ) A: It<br/>is inactivated by conversion to paraoxon B: It<br/>is less toxic to humans than malathion C: It is more persistent in the environment than DDT (dichlorodiphenyltrichloroethane, halogenated hydrocarbon insecticides) D: It<br/>is poorly absorbed through skin and lungs E: If<br/>treated early, its toxicity may be partly reversed by pralidoxime