NEET BIOLOGY

Detailed explanation-1: -Gene regulation can occur at any point of the transcription-translation process but most often occurs at the transcription level. Proteins that can be activated by other cells and signals from the environment are called transcription factors.

Detailed explanation-2: -The highest level of transcription regulation occurs through the rearrangement of histones in order to expose or sequester genes, because these processes have the ability to render entire regions of a chromosome inaccessible such as what occurs in imprinting.

Detailed explanation-3: -The expression of eukaryotic genes is controlled primarily at the level of initiation of transcription, although in some cases transcription may be attenuated and regulated at subsequent steps.

Detailed explanation-4: -Transcription: The primary step of gene regulation is transcription i.e. process by which information from DNA is converted to RNA i.e. mRNA. In this process, only one strand of DNA is copied into RNA.