Chromosomes are made of which substance?

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Prepare for the Virginia 7th Grade Science SOL Test. Incorporate flashcards and multiple choice questions, each with hints and detailed explanations. Ensure your success on the exam!

Multiple Choice

Chromosomes are made of which substance?

Explanation:
Chromosomes are made of chromatin, the material inside each chromosome that carries genetic information. Chromatin is DNA wrapped around proteins called histones, which helps package that long DNA molecule into a compact form so it fits in the cell nucleus and can be correctly separated during division. While DNA contains the genetic code, the proteins organize and condense the DNA into chromatin, which is the actual substance that makes up chromosomes. In nondividing cells, chromatin is looser; when a cell prepares to divide, it condenses into the visible chromosomes.

Chromosomes are made of chromatin, the material inside each chromosome that carries genetic information. Chromatin is DNA wrapped around proteins called histones, which helps package that long DNA molecule into a compact form so it fits in the cell nucleus and can be correctly separated during division. While DNA contains the genetic code, the proteins organize and condense the DNA into chromatin, which is the actual substance that makes up chromosomes. In nondividing cells, chromatin is looser; when a cell prepares to divide, it condenses into the visible chromosomes.

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