The lac operon consists of a coding region, which contains three genes that code for proteins needed to metabolize lactose, and a regulatory region, which regulates transcription of the coding region. a. True
b. False

True.

Explanation:

The lac operon consists of a coding region, which contains three genes that code for proteins needed to metabolize lactose, and a regulatory region, which regulates transcription of the coding region because The lac operon comprises of a coding region, that is made up of three genes . These genes code for proteins that is needed to metabolize lactose, and a regulatory region, which help to regulate transcription of the coding region.

The three enzymes are lacZ, lacY, and lacA . LacZ is responsible for encodinv an enzyme called β-galactosidase, which help to digest lactose and break it into two constituent sugars: glucose and galactose. lacY is a permease which move lactose into the cell.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set