OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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wrapped around histones in chromatin form
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tightly coiled into chromosomes
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just as it appears in a karyotype
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DNA has no structure during replication
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Detailed explanation-1: -In eukaryotic cells, DNA is wrapped around histone octamers to form nucleosomes, the basic building blocks of the chromatin structure.
Detailed explanation-2: -DNA molecules first wrap around the histone proteins forming beads on string structure called nucleosomes.
Detailed explanation-3: -The process starts when DNA is wrapped around special protein molecules called histones. The combined loop of DNA and protein is called a nucleosome. Next the nucleosomes are packaged into a thread, which is sometimes described as “beads on a string". The end result is a fiber known as chromatin.
Detailed explanation-4: -As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.