What are gene expression controls on the different levels of gene regulation in transcription, translation and post translation? Solution Regulation of gene expression includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products and is informally termed gene regulation. Transcriptional Control During Transcriptional Control of Gene Expression transcription is initiated at the promoter RNA polymerase must bind here to begin transcription Transcriptional control allows variation in mRNA levels for specific enzymes. The cell avoids the production of these enzymes by utilizing regulatory proteins that prevent RNA polymerase from binding to a promoter. Translational Control It allows the cell to control the translation of an mRNA molecule that has already been transcribed. Regulatory molecules can speed up mRNA degradation by ribonucleases. Translation initiation can be altered. Translation proteins can be affected. Post translation control Post-translational control occurs when the cell controls the activity of an existing protein by chemical modification. Post-translational control provides the most rapid response but is energetically expensive.

1. Which of the following is true of the moss life cycle? The male and female structures are found
on the same individual gametophyte in many species The egg is produced in the antheridium
The gametophyte is dependent on the sporophyte The sperm are carried to an egg by the wind
The spore produces the sporophyte
Solution
the correct option is:
In Moss, the stryucture called Operculum disperses the spores. this structure is p[resent on the
sporophyte.
When the spores germinate, leafy gametophyte is formed which then produces sperm and egg in
the Antheridia and Oogonia respectively.
So it is true that Gametophyte is dependent on sporophyte.