Question

Part 1 (1 point) Consider the image and then answer the first question. Histone protein linker Cytosine methylation Histone modifications Nucleos This DNA could represent DNA prokaryotic eukaryotic Part 2 (1 point) Within the image, identify the heterochromatin and euchromatin by dragging the labels to their targets. A heterochro matin euchromati Part 3 (1 point) Consider the following image. If a nuclease (enzyme that digests DNA) was applied to the sample on the left and the sample on the right, which would generate more DNA fragments? Identify by dragging "more fragments" to the appropriate target. A) more fragments

Answer 1

part 1

The first figure (a) figure represent euchromatin region which is loosely packed and uncoiled. The second figure (b) represent heterochromatin which is coiled and tightly packed. The heterochromatin has high DNA density and are stained dark where as euchromatin has lightly stained regions with low DNA density.

part 2

The more fragments will be generated by euchromatin that is first figure . This is because active genes are more susceptible to nuclease activity that heterochromatin even though it have high DNA density.The euchromatin is transcriptionally active where as heterochromatin us transcriptionally inactive either permanently or temporarily.