If the genome structure exists in the form of heterochromatin, this indicates that the cell is------ Select one: a. Going to be metabolically active b. Highly methylated c. Going through the process of apoptosis d. Very poorly methylated e. Replicating
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- The role of p53 in normal cells is toa. create cancer-blocking mutations.b. trigger unrestrained cell division.c. detect damaged DNA.d. splice exons together in the correct sequence.Look at the picture carefully below and imagine inside a cell nucleus. a) encircle and name the parts where DNA is most accessible and least accessible b) how nucleosome positioning or spacing can interfere with DNA accessiblity_____ is the combination of a seat, elation, another modifications to the histones that allow for changes in DNA winding and unwinding a. Epigentics b. Histone code c. Heterochromatin d. Post translational modifications
- The form of DNA that contains genes that are actively beingtranscribed is calleda. histones.b. telomeres.c. heterochromatin.d. euchromatin.After transcription, the molecule that is formed is a.complementary to part of one strand of DNA. b.complementary to both strands of DNA. c.double-stranded and inside the nucleus. d.identical to an entire single strand of DNA.Stem cells (cells with little or no determination) are useful in many kinds of biological research for which of the following reasons? Group of answer choices A. they do not have particular cell fates B. None of their DNA is methylated C. They have unique cytoplasmic determinants D. They have no microRNA E. They have not differentiated
- Addition or deletion of bases causes which kind of mutation? Select one: a. Frameshift mutation b. Transversion c. Transition d. TranscriptionChromatin remodeling is affected by two processes, DNA methylation and a. base substitution b. histone covalent modifications c. ultraviolet radiation d. transcription factor bindingWhich statement about transposons is INCORRECT? a.A transposon is a small fragment of DNA that can move from one location in a chromosome to another location in the same chromosome. b.Transposon insertion into a gene causes a mutation that can be reversed by removal of the transposon. c.Transposon movement often occurs when the cell is under genomic stress. d.In nature, insertion of a transposon can be deliberately added into a harmful gene to enhance survival.
- In a nucleosome, what is the DNA wrapped around? A. mRNA B. Nucleolus protein. C. Ribosomes. D. Polymerase molecules. E. HistonesWhy do stem cells that have been damaged prefer apoptosis over repairing the genome? a. Stem cells cannot repair the damaged genome b. The repair machinery is not perfect and therefore prone to make mistakes c. They don't d. None of the aboveA faulty protein is found in the cell. A further investigation proved that the DNAsequence in the genome responsible for this protein was intact, there is no change insequence but still the protein is found as faulty. What do you think why the protein isproduced as faulty? Explain with logic.