10. What is the structure of chromatin and how does it affect gene regulation?

Chromatin accessibility is regulated by nucleosome remodeling, utilization of histone variants, DNA methylation, and posttranslational modifications (PT.Ms). Chromatin remodeling complexes can slide nucleosomes, rotate the DNA helix relative to the nucleosome to expose T.F binding sites, or evict nucleosomes. imma say Chromatin structure plays a key role in regulating gene expression by allowing DNA accessibility to transcriptional machinery and transcription factors 12.

Explanation:

60 x 5 = 300 days

So five half-lifes = 300 days

Starting amount = 500mg

Amount after 1st half-life = 250 mg

Amount after 2nd half-life = 125 mg

Amount after 3rd half-life = 62.5 mg

Amount after 4th half-life = 31.25 mg

Amount after 5th half-life = 15.625 mg

Hence after 300 days, the amount of iodine-125 will be 15.625 mg out of 500 mg.

Explanation: