In most bacterial operons, such as the lac operon, which of the following dna segments is responsible for controlling whether the operon is off or on?

a. lacy gene.
b. promoter
c. operator
d. repressor

What are the characteristics of living things

{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.