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Question
Which can be observed in an interphase nucleus under the light microscope?
Which can be observed in an interphase nucleus under the light microscope?
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Solution
The correct option is D Heterochromatin
In an interphase, nucleus heterochromatin can be seen under the light microscope. The heterochromatin is condensed in the secondary constriction I and II of the chromosome. Heterochromatin is a tightly packed form of DNA, which comes in different varieties. These varieties lie on a continuum between the two extremes of constitutive and facultative heterochromatin. Both play a role in the expression of genes. Chromatin is found in two varieties: euchromatin and heterochromatin. Heterochromatin has been associated with several functions, from gene regulation to the protection of the integrity of chromosomes; some of these roles can be attributed to the dense packing of DNA, which makes it less accessible to protein factors that usually bind DNA or its associated factors.
In an interphase, nucleus heterochromatin can be seen under the light microscope. The heterochromatin is condensed in the secondary constriction I and II of the chromosome. Heterochromatin is a tightly packed form of DNA, which comes in different varieties. These varieties lie on a continuum between the two extremes of constitutive and facultative heterochromatin. Both play a role in the expression of genes. Chromatin is found in two varieties: euchromatin and heterochromatin. Heterochromatin has been associated with several functions, from gene regulation to the protection of the integrity of chromosomes; some of these roles can be attributed to the dense packing of DNA, which makes it less accessible to protein factors that usually bind DNA or its associated factors.
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