Non-fluorescent calcein AM is hydrolyzed by intracellular esterases into the green fluorescent dye calcein, which can be used to quantify the number of viable cells.
https://www.creative-bioarray.com/support/calcein-am-cell-viability-assay.htm
Answer: Cell membrane is layer which is present in all living cells. It is present under the cell wall but in some cases such as plant cells.
Explanation: It is composed of lipid bilayer and proteins embedded in it. Phospholipids, glycolipids and sterols is the composition. Its function is to protect the cell from extracellular environment. It is semipermeable membrane that js allow only selected molecules to pass.
Answer:
small pebbles ( last choice)
Answer:
D
Explanation:
The water molecule is polar because the oxygen atom is more electronegative than hydrogen causing the electrons from the hydrogens to gravitate closer to the oxygen atom. The molecule is like a magnet; the negative oxygen end will want to stick to the positive hydrogen end of another molecule. Hope this helps
Answer:
Globular cluster
Explanation:
A globular cluster is a spherical collection of stars. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and high stellar densities toward their centers.