Describe the interactions between transcription factors and promoter sites that lead to the initiation of transcription. Predict the effect of adding negative regulation molecules to the interaction.

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic