The role of sigma factor during bacterial transcription is to cause

During X-chromosome inactivation in the embryo, where is the Tsix gene expressed?

The function of aminoacyl-tRNA-synthetase is to

Match the responses to the tuning parameter sets  

When a gene knockin is made in mice, where is the gene of interest inserted?

The restriction enzymes shown below cut DNA in the following manner. The slashes indicate where cutting occurs. BamHI                         G\GATCC                                     CCTAG\G   EcoRI                          G\AATTC                                     CTTAA\G        HaeII                           GGCGC\C                                    C\CGCGG   PstI                             CTGCA\G                                    G\ACGTC These enzymes will generate sticky ends that will bind to complementary sticky ends? Rank them from those that would produce the most stable sticky ends to the least stable. 

The restriction enzymes shown below cut DNA in the following manner. The slashes indicate where cutting occurs. BamHI                         G\GATCC                                     CCTAG\G   EcoRI                          G\AATTC                                     CTTAA\G        HaeII                           GGCGC\C                                    C\CGCGG   PstI                             CTGCA\G                                    G\ACGTC Which of these enzymes would generate sticky ends that would be the most stable when they bind to complementary sticky ends?

Human insulin that is used to treat diabetic patients is commonly made in bacteria. When insulin is made in bacteria, why are the A and B chains are linked to β-galactosidase?

The various types of stem cells in an adult human body can be

As described in your textbook, one way to determine if a segment of chromosomal DNA has been inserted into a vector is to put XGal in the growth media. Following overnight growth, some of the colonies are blue and some are white. Why are some colonies blue?