You have identified a mutant E. coli strain that cannot synthesize histidine (His-).To determine the location of the his- mutation on the E. coli chromosome, interrupted mating experiment was performed with 5 different Hfr strains. The following chart shows the time of entry (minutes, in parentheses) of the wild-type alleles […]

Experimental Analysis: Introduction The experiment conducted involves the factor of vigilance when it comes to keep clear of the predators. Vigilance forms the part of the behavioral ecology and refers to an animal’s examination of its surroundings so that it can keep itself safe and at a good distance from […]

1. CONCISELY AND CLEARLY describe the regulatory switch of the operon that manufactures tryptophan in E. coli. 2. CONCISELY AND CLEARLY describe the roles that RNA polymerases I, II & III play with respect to the major RNA types in eukaryotic cells? 3. Why are there 48 (humans) different tRNAs […]

Lab: Writing Assignment How does ethylene affect ripening of fruit? This assignment requires you to evaluate a hypothesis and communicate the results of your study on the production and effects of ethylene on ripening of fruit. The questions below are meant to guide you to reporting the key findings of […]