Genetics Quiz #1: Chromatin Structure

1. mark reviewA research scientist is studying chromatin structure and its role in gene expression. She generates an image showing a nucleosome, the fundamental unit of chromatin, consisting of DNA wrapped around a histone octamer. This histone octamer includes two copies each of H2A, H2B, H3, and H4 histones. Based on this organization, which of the following best describes the role of the nucleosome in DNA packaging?

     Nucleosome

Question 1 of 6

2. mark reviewA scientist is studying a region of DNA that is highly condensed and transcriptionally inactive. This region is likely which of the following?

Question 2 of 6

3. mark reviewWhat is the primary difference between facultative and constitutive heterochromatin?

Question 3 of 6

4. mark reviewWhich of the following forms of chromatin is primarily found at the centromeres and telomeres of chromosomes?

Question 4 of 6

5. mark reviewWhich of the following structures is best described as transcriptionally active and less condensed?

Question 5 of 6

6. mark reviewWhich of the following is likely to occur when a region of euchromatin is converted to heterochromatin?

Question 6 of 6


 

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