This paper presents a problem-solving test that deals with the regulation of the "trp" operon of "Escherichia coli." Two mutants of this operon are described: in mutant A, the operator region of the operon carries a point mutation so that it is unable to carry out its function; mutant B expresses a "trp" repressor protein unable to bind…

This booklet is intended to help students do their best on the ACT. It summarizes general test-taking strategies, describes the content of each test, provides specific tips for each, and lets students know what they can expect on test day. Included in this booklet are complete practice tests--"retired" ACT questions that were administered to…

This booklet contains the practice tests for the Sixth-grade Ohio Proficiency Tests. Student work on these practice tests helps the teacher evaluate how well the student understands the subjects of writing, reading, mathematics, citizenship, and science. The writing test consists of two writing tasks based on one stimulus passage, and the reading,…