Question

tations and Regulation of Gene Expression 6. Which of the following statements about the DNA in your brain cells is TRUE? a. The majority of the DNA in these cells is made up of genes that code for proteins. b. The majority of genes in these cells are expressed as RNA or proteins. C. Your brain cells contain approximately the same DNA as your heart cells. d. All of the above are true. 7. [Background: Disruption of gene expression can lead to many different types of health conditions, including different forms of cancer.) Imagine you are studying a gene that is associated with cancer. When you compare the amount of mRNA from this gene that is present in normal cells versus cancer cells, you find LESS of this particular mRNA in the cancer cells compared to normal cells. Propose 2 mechanisms that could explain why this would happen. 2.
someone please help! i have a brain fart :/

Answer 1

Answer.

6. All the statements are true, therefore, option d is correct.

7. The two plausible mechanisms that can result in less of mRNA of a gene in cancer cells as compared to normal cells are:

1. The expression of this particular gene might be regulated by some other protein or transcription factor which binds on the promoter of this gene and that protein or transcription factor is misregulated in a cancer cell. It is possible that the binding of this protein on the DNA is affected and hence the mRNA expression is not seen.

2. It is also possible that some mutation has happened in the gene over time and due to which the gene is not transcribed to its full mRNA and hence no expression.