What are the differences between the G0, G1, and G2 phases of the cell cycle? Do all cells proceed through each of these phases? g

The cell division is divided into two main phase - interphase and M (mitosis) phase. The interphase is further divided into G1, S phase and G2 phase.

G1 (gap 1 phase): The G1 phase is marked by the complete growth of the cell. The cells accquire different proteins and factors that are necessary for the cells to undergo the process of DNA rep[lication of the synthesis phase.

G2 phase (gap 2 phase) : During the G2 phase the cells prepares itself to undergo the M phase and underwent through the different phases of the cell cycle. The nuclear envelope forms around DNA and centrosomes are fully developed.

G0 phase: The G0 phase is also known as the extended phase of the G1 cycle. The G0 phase occurs when the cells are completely ready but do not undergo G1 phase, this might occur when the tissue is under the generation process.

The cells will go through the G1, S, G2 and M phase of the cell cycle. This is not necessary that all cells undergo the G0 phase of the cell cycle.

hydroxyl -oh

alcohols, always polar, can form hydrogen bonds with h2o molecules

carboxyl -cooh  

cargoxylic acids, has acidic properties which is a source of hydrogen ions, found in cells in ionized for with a charge of oh-1

carbonyl > co

ketone if within skeleton, aldehyde if group is at the end of skeleton, k & a may be structural isomers, it determines 2 sugars (ketose & aldose)

amino -nh2

amines, acts as a base, it can pick up h+ ions from surrounding solution, ionized with charge of 1+

methyl ch2

addition to rna/dna affects and gene expression

phosphate -opo3 ²⁻

organic phosphates, contributes to negative charge to, molecule that it is a part of, and potential to react with h20

sulfhydryl -sh

thiols, cross-linking stabilize the protein, and it is structure

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.