The control of gene expression may occur at several levels in the cell. For example, genes rarely operate during mitosis, when the DNA fibers shorten and thicken to form chromatin. The inactive chromatin is compacted and tightly coiled, and this coiling regulates access to the genes.
The activity is an application of Learning Objectives 3.21 and 3.23 and Science Practice 1.4 because students are using a representation to describe how operons regulate gene expression in prokaryotes. In addition, students are applying Science Practice 6.4 because they will use the model to make predictions about gene regulation and expression.
Jul 27, 2020 · Try this amazing Chapter 16: Control Of Gene Expression quiz which has been attempted 1386 times by avid quiz takers. Also explore over 84 similar quizzes in this category.
Gene definition, the basic physical unit of heredity; a linear sequence of nucleotides along a segment of DNA that provides the coded instructions for synthesis of RNA, which, when translated into protein, leads to the expression of hereditary character.