The molecule which has likely been removed or mutated from a cell that can form beads on a string chromatin, but not solenoid fibers is: A. Η1
A cell can be defined as the fundamental functional, structural and smallest unit of life for all living organisms.
Genome editing refers to a high-tech process through which scientists remove (delete), replace or insert a deoxyribonucleic acid (DNA) sequence into the cells of a living organism such as an animal, bacterium, plant, etc., so as to improve on its physical and chemical conditions or correct a genetic disorder.
Chromatin can be defined as a complex form of deoxyribonucleic acid (DNA) and protein found in the cells of an eukaryotic organism.
In the classic model of chromatin, the beads simply refer to the nucleosomes while the string is simply the linker deoxyribonucleic acid (DNA).
Basically, the deoxyribonucleic acid (DNA) is wrapped around histone proteins to form nucleosomes and the beads on a string structure (euchromatin).
Furthermore, there exists a linker histone H1 in addition to core histones that reaches the entry or exit of the deoxyribonucleic acid (DNA) strand on the nucleosome.
In conclusion, a cell cannot form beads on solenoid fibers but it can form beads on a string chromatin because the H1 molecule has likely been removed or mutated in the cell.
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