Module6LabAnswerSheet RANKOW Essay - 1184 Words

******************************************************************************************** NAME: HEATHER M. RANKOW Answer Sheet—Module 6 Lab Gene Expression View the following animation about gene switches: http://www.hhmi.org/biointeractive/gene-switch 1. What does the yellow part of the DNA represent? The yellow part of the DNA is use for coding. It only expressed if RNApolymerase lands on gene’s promotor and makes mRNA from the gene. 2. What does the pink part of the DNA represent? The DNA promoter 3. What needs to land on the pink part in order for the gene to be expressed? RNA Polymerase 4. What do the blue, red and green parts of the DNA represent? Regulator switches 5. What are the functions of the blue, red, and green†¦show more content†¦It becomes tightly wound and the genes are inaccessible. b. What happens to the amount of GFP mRNA? It reduces, there is almost none left. c. What happens to the amount of green fluorescent protein? It also reduces. d. What happens to the appearance of the cell? It becomes faded with a faint green color. 3. Click on the Labels button near the control knob to reveal the following three links that reveal information when clicked. Summarize the function of each: a. a. histone – these are a type of protein that help to organize the DNA. There are 8 histones that make up one group. Each have tails that are covered with chemical tags and stick out of the protein grouping. The chemical tags on the tails affect how they interact with DNA. b. b. methyl tag – these are used to either keep genes silent or turn them off. They are added to a cytosine in any sequence of CG sequence of Nucleotides. They can turn off or silence the gene in two ways: (1) by blocking transcription or (2) by recruiting proteins that bind to methylated DNA, which then also block transcription machinery from binding to the active site. c. c. acetyl tag – these tags occur near active genes. It allows for the activity between the histones and DNA to relax making the DNA accessible. These tags are added to the amino acid lysine on the tails of histone proteins. It is one of the many tags that make up the histone code. 4. Click on Insights from Identical Twins and then view the video Identical Twins: