Biology CLEP Prep Practice Exam

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What is the role of achromatin in the cell?

  1. Form the genetic material

  2. Involved in metabolism

  3. Provide structure for chromosomes

  4. Store oxygen

The correct answer is: Provide structure for chromosomes

Achromatin does not form the genetic material, which is made up of DNA and proteins called histones. Histones are responsible for packaging DNA into tightly coiled structures, while achromatin is the more loosely coiled form of DNA found in the nucleus. While achromatin may play a role in metabolism by regulating gene expression, it is not its primary function. Achromatin is primarily involved in regulating gene expression, either by making certain genes accessible for transcription or by preventing them from being transcribed. Achromatin also does not store oxygen. This is primarily done by hemoglobin in red blood cells.

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