Two weeks before her menstrual period, margeret often suffers from PMS. The abbreviation PMS stands for Premenstrual syndrome .
Premenstrual syndrome is a combination of emotional, physical, psychological, and mood disturbances that occur after a woman's ovulation, typically ending with the onset of her menstrual flow. The most common mood related symptoms are irritability, depression, crying, oversensitivity, and mood swings.
Answer:
i would think vegitarians because we an eventually run out of meat but we can keep growing vegtables
Explanation:
All of the liquid molecules in cell membranes amphipathic (or amphiphilic) -that is, they have a hydrophilic ("water loving") or polar end and a hydrophobic ("water fearing") or nonpolar end. The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails.
Hope that Helps :)
Answer:
Tryptophan synthesis enzymes be made during low level of cellular tryptophan.
Explanation:
Tryptophan operon contain 3 regulatory gene(trpR,trpP and trpO) and 5 structural genes(trpE,trpD,trpC,trpB and trpA) .trpR encodes the repressor protein that interacts with tryptophan present in the media and then the tryptophan repressor complex binds to the operator region to block the transcription of the structural genes of tryptophan operon.
Here tryptophan acting as a corepresor.During mutation of trpR gene tryptophan biosynthesis enzymes will be synthesized only when the cellular tryptophan level remains very low.
