Scientists carried out a microarray analysis to compare the gene expression of normal pancreatic cells to that of cancer cells from a person with pancreatic cancer. The scientists labeled the cDNA from the normal pancreatic cells with green fluorescent nucleotides. They labeled the cDNA from the cancer cells with red fluorescent nucleotides.  The two cDNAs were mixed and allowed to hybridize to a microarray. Less p53 activity is found in cancer pancreatic cells than normal cells.  What color would the spot for the p53 gene be on the microarray?  Red Green Yellow Black

You have two mutants of pQE. 1-CRYGD. One is 66 ng/uL and the other is 337 ng/uL. You need to add 1 ng to your competent  NEB Express Iq cells.  A. Can you accurately pipet the plasmid for each? Why or why not? B. How could you dilute the plasmid to obtain 50 uL of 0.5 ng/uL? C.How much of the new 0.5 ng/uL sample would you need to pipette for 1 ng

Three mutations were obtained in a bacterial gene. An antibody is available for the protein product of this gene. Both Northern analysis (RNA separated by electrophoresis, blotted, and probed with DNA) and Western analysis (proteins separated by electrophoresis, blotted, and probed with antibodies) were performed on the mutants. The results are summarized below. Northern Size Western Size 1 2 3 1 2 3 + Long Short Short Long For each mutation, what kind of mutation occurred and how do you know? a) Mutant 1 b) Mutant 2 c) Mutant 3

In the experiment summarized below, scientists were examining the presence of specific sequences in individuals with age. In this experiment they extracted DNA from lymphocytes of various aged individuals and measured the length of a TTAGGG (in kb) repeat they found in their genomic DNA (Left Panel). In the right panel, the scientists measured the length of the same repeats in individuals with lymphocyte failure (red dots most severely effected) that have a mutation in a critical enzyme. Answer the following questions in 2-3 sentences each. A. What is the name of the specific sequence the scientists are measuring in the experiment shown below. B. For the individuals with lymphocyte pathology in the right panel, which gene is likely defective that causes the data shown? C. Explain why the length of the repeat sequence decreases with age.