What has to happen before mitosis begins?

1 answer:

5 0

Mitosis is simply a stage in a cells life cycle, which could be broken down further into stages of mitosis. The rest (so not mitosis) is know as Interphase and is where the cell does its normal function, so if it's the cell is in a region of muscle it would contract/relax as normal etc.

Immediately before mitosis (or M phase) is what's know as G2 phase, where the G stands for growth and is where particular gene pathways are expressed to promote growth of the volume of DNA (chromosomes are duplicated, so from 46 to 92). At the end of this stage is a checking process where the DNA is scrutinised for any errors, if all is okay then the cell can proceed to mitosis, if not then the process is stopped so that errors in copying the DNA can be fixed. This is know as a restriction point and the cell must meet the requirements to pass. This is often seen as a way cells can prevent damage being replicated and therefore interfering with normal cell processes. When cells are cancerous they are able to override this and therefore divide and spread the damaged DNA.

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Always hold the lead rope in the right hand by coiling the excess rope on the hand in the other hand.

Lead the left shoulder of the horse with the assistant's right hand with the excess of rope in the left hand of the assistant to avoid serious injury when the horse decides to bolt.

It becomes important to stable the horse by calming the horse before the routine veterinary procedure.

A leather band should be used in the rope by being tightened behind the legs of the front and by further fastening.

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In humans, the hormone testosterone enters cells and binds to specific proteins, which in turn bind to specific sites on the cel

Crank

Answer:

They act to regulate the expression of specific genes (androgen-responsive)

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Testosterone is a reproductive hormone in male humans. Testosterone as well as its closely related hormones e.g dihydrotestosterone, all belong to a class of hormones called "Androgens".

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