Samples of a 4578 bp plasmid (i.e. circular DNA) is digested with the following enzymes and subjected to electrophoresis. The results are indicated in the below table.Enzyme Resulting Fragment Sizes (in base pairs)HindIII 4578EcoRI 1851 and 2727HindIII & EcoRI 437, 1851 and 2290 Draw a restriction map of the plasmid. […]

Recent scientific and public policy discussions have focused on some natural and man-made substances, external to the body, and whether or not these substances interact with the endocrine system. The topic of “endocrine disruptors” is being popularized in media reports and discussed at scientific conferences. Read the following article and […]

1. What mode of nutrition is performed by organism in the protista kingdom? A) autotrophic B) heterotrophic C) both A and B D) neither A nor B 2. All members of the protista kingdom are composed of A) eukaryote B) prokaryotic cells C) A and B D) Nether A nor […]

A researcher recently found out a mutant mouse with an interesting T cell phenotype. He called this new mutation: HD,” bred the mouse and then used these founders to produce a strain homozygous for HD. Some of his findings are summarized in the table below:   Thymocytes Lymph node t […]