Cholesterol is an organic steroid in mammalian cells that controls membrane permeability and fluidity. how many hydrigens

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"Cholesterol is an organic steroid in mammalian cells that controls membrane permeability and fluidity. How many hydrigens are in cholesterol?"

46

Explanation:

Cholesterol contains carbon, hydrogen and oxygen atoms, and its molecular form is C27H46O, which means that cholesterol has 27 carbon atoms and 46 hydrogen atoms. Its structure consists of a region of 4 hydrocarbon rings attached to a hydroxyl group at one end and a hydrocarbon tail at the other. The hydroxyl group is the only hydrophilic part of the molecule, which makes it insoluble in blood as mentioned above.

The structure of cholesterol can be seen in the image below.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

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