DNase I cuts DNA that is not protected by bound proteins but is u...

Question

DNase I cuts DNA that is not protected by bound proteins but is unable to cut DNA that is complexed with proteins. Human DNA is isolated, stripped of its nonhistone proteins, and mixed with DNase I. Samples are removed after 30 minutes, 1 hour, and 4 hours and run separately in gel electrophoresis. The resulting gel is stained to make all DNA fragments in it visible, and the results are shown in the figure. DNA fragment sizes in base pairs (bp) are estimated by the scale to the left of the gel.

Examine the gel results and speculate why longer DNase I treatment produces different results.

Accepted Answer

Hello, everyone and welcome to today's video. So which one of the followings is a DNA digestive enzyme responsible for the digestion of extracellular nuclear proteins resulting in a reduced autoimmune response. As answer choice A we have DNA helicase as answer choice B we have top Y sura as answer choice C we have DNA primate and as answer choice C we have DNA. Let's begin by answer choice A which is DNA helicase. But remember from previous videos that DNA he case is an enzyme responsible for on winding the double stranded DNA molecule during replication. So it is not going to be that what the question is mentioning and we're going to cancel it out. Then we have to isomerase and Toppo isom isra is an enzyme responsible for relieving the strain that is created when DNA is unwound during replication. So this is again, not what the question is mentioning and we're going to be canceling it out. Then we have DNA primates as answer choice. C DNA primates is an enzyme that is responsible for synthesized for synthesizing short R N E primers that are used to initiate DNA replication. Again, know what the question is mentioning. So we're going to cancel this out. And finally, we have D which is DNA and DNA is an enzyme that is responsible for the digestion of these extracellular nuclear proteins. It breaks down DNA and R N A molecules are found in the extracellular environment which helps to reduce an autoimmune response. This is exactly what the question is stating. So we're going to highlight answer choice C DNA S as a final answer to our question. I really hope this helped you and I hope to see you on the next one.

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing