We can tell the age of a yeast cell by counting scars or bud scars.
As a mother cell of yeast goes through successive rounds of cell division, the Bud scars remain permanently deposited on the surface of the mother cell. The budding of each daughter cell leaves a ring-shaped deposit which is called a bud scar which deposits on the cell wall of the mother cell.
Therefore, if the mother cell divides, it will leave bud scars. Again if the daughter cell divides, then again, it will leave bud scars. So, counting these ring-shaped deposits or bud scars will give the number of successive cell divisions and the age of yeast cells.
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Sodium carbonate is a basic salt because it is a salt derived from a weak acid and strong base.
Yes, The energy source for all stars is nuclear fusion.
The receptors for steroid hormones are reside inside the cell instead of the membrane surface, like most other signal receptors. So, Steroid hormones are lipid soluble. Steroids gain access to their receptors because they can readily diffuse through the lipid bilayer of the cell membrane.
Steroids are man-made hormones which are lipid soluble and are normally produced by our adrenal glands, which are two small glands always found above the kidneys. When steroids are taken in higher doses than the amount your body normally produces and that steroids reduce redness and swelling.
Therefore, steroid harmone signalling is a lipid-soluble signalling which can be transmit through the bloodstream from an endocrine gland bound by a steroid binding protein (SBP).
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