1- Examples of positive and negative control of transcription can be found in the regulation of expression of the bacterial operons lac and trp. Use these two operon systems to describe the difference between positive and negative regulation. 2-The number and type of proteins found in a cell can be […]

A total of 17.70 mL of 0.1200 M NaOH was required to reach a phenolphthalein endpoint during titration of a 5.00 mL sample of juice. Calculate the number of moles of H+ per mL of juice. Assuming the acid is citric acid and that all three ionizable hydrogens are neutralized, […]

1. Reporter genes are often used to study how the transcription of a particular gene is controlled during fruit fly development. You are interested in a gene called brainless that you think is involved in neural cell development.a. Draw or describe how the reporter gene construct would be constructedb. Give […]

gene A controls the sharpness of spines in a type of cactus. cactuses with the dominant allele, A, have sharp spines, whereas homozygous recessive aa cactuses have dull spines. at the same time, a second gene, N, determines whether cactuses have spines at all. Homozygous recessive nn cactuses have no […]