1. A scientist mutates a gene in yeast and then looks to see what effect the mutation has on the phenotype in yeast. This is an example of
| A. | DNA fingerprinting. |
| B. | next-generation sequencing. |
| C. | RNAi. |
| D. | reverse genetics. |
| E. | positional cloning. |
2.
The increased levels of telomerase associated with many tumor cells likely promotes cancer by…
| A. | Enhancing levels of DNA repair so that cells remain normal and have stable genomes and thus would be able to replicate their DNA and divide more often. |
| B. | Promoting the efficiency of the spindle-assembly checkpoint |
| C. | Reducing the expression of several oncogenes |
| D. | Allowing cells to continue to divide when normally chromosomes should shorten beyond a point where division would be no longer possible |
| E. | Decreasing the number of epigenetic changes that would promote cancer |
Answer :
Question number 1 : The correct answer is D (Reverse genetics)
Question number 2 : The correct answer is D (Allowing cells to continue to divide when normally chromosomes should shorten beyond a point where division would be no longer possible).
Explanation : Most normal cells loose telomerase activity with increaseing age of the organism and repeated generations of the cell division. In other words after certain number of divisions normal cells reaches the Hayflicks limit beyond which cells will no longer devide instead they die
1. A scientist mutates a gene in yeast and then looks to see what effect the...
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