SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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gene ____ S phase
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chromatin ____ mitosis
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chromosome ____ interphase
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chromosome ____ cell division
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Detailed explanation-1: -Heterochromatin is very tightly packed and condensed. The formation of heterochromatin involves modifications to histones and the recruitment and spreading of silencing complexes, which cause changes to the structure of chromatin. These changes affect various DNA processes, including gene transcription.
Detailed explanation-2: -DNA is tightly packed up to fit in the nucleus of every cell. 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.
Detailed explanation-3: -DNA of chromatin material is organized into chromosomes during cell division.
Detailed explanation-4: -Nucleus. Known as the cell’s “command center, ” the nucleus is a large organelle that stores the cell’s DNA (deoxyribonucleic acid). The nucleus controls all of the cell’s activities, such as growth and metabolism, using the DNA’s genetic information.