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B is the correct response.Poor solubility in water.

As lipids, waxes, steroids, and fats are vital to living cells.Water solubility is low in lipids, and their chemistry depends on the type of bond between atoms in these molecules.

A lipid is a long chain of hydrocarbons attached to carbon atoms that are bonded to one another.Despite having so many bonds in fats, they still have a lot of energy stored, more so than other biological molecules, such as proteins or carbohydrates.

Phospholipids, which consist of phosphate chains bound to fatty acid tails, are the main components of the plasma membrane.A molecule that is amphipathic has hydrophilic and hydrophobic components that make it selectively permeable.


The sterol cholesterol belongs to is a steroid, a steroid form found mostly in cell membranes that provides some flexibility to them.

As a result of the cholesterol, bile salts are formed in the digestive system of animals, which are essential to emulsifying fats.Other steroids develop into hormones like testosterone and estradiol.

An important component of living organisms, such as plants and insects, is wax.Prevsaycheesegcc.com's wax forms a layer that prevents such organisms from desiccating when conditions are dry and hot.In this way, plants and insects have colonized a variety of habitats around the world.

Lipids

The lipids that make up fats, waxes, and steroids play an important role in living cells.

Chains of glycerol are bonded to hydrocarbons, and the hydrocarbons contain atoms in either single or double bonds.

.Additionally, fat characteristics are affected by how many double bonds there are in it.

Various types of lipids exist in nature, and they play an important role in maintaining organisms and cells.

Importance

Because lipids contain many bonds, they are a good source of stored energy.More saycheesegcc.comergy is stored in them than in other biological macromolecules.

It has been determined that some of these saycheesegcc.comgenous biological molecules can actually produce as much as 9 kcal of saycheesegcc.comergy per gram of molecule, which is more than twice as much energy as is created when carbohydrates and proteins are broken down.

In biologically important structures, lipid molecules form bonds with other molecules.Among other things, the plasma membrane of living cells is made of lipids bonded to phosphate groups.

Apart from phospholipids, cell membranes also contain cholesterol and glycolipids.

Also, fats are crucial for the proper operation of our nervous system.Many of our nerve cells are capable of working and transmitting impulses rapidly since they are encased in fatty myelin.

The myelin molecule also possesses a carbohydrate bond.This compound consists mostly of a glycolipid called galactosylceramide.


Water repelling properties of fats are used to waterproof arthropods, such as insects and plants, as well as the outer epidermis of fungi.The fats in these organisms prevent water from being lost in hot and dry conditions.

Phospholipids

In the plasma membrane, phospholipids form a double layer consisting of fatty acids that tail inward and head outward.While the phosphate group that is bonded to the hydrocarbon chain of the fatty acid is hydrophilic, the tails are hydrophobic.

Hence, these molecules are called amphipathic molecules, which confer to the membrane the property of selective permeability.Saycheesegcc.com does this to ensure that substances cannot move easily into and out of cells.

As a result, the lipid bilayer is very efficient at controlling the passage of molecules, and many molecules can only pass through the membrane via special channels embedded in the membrane.

Steroids

In a lipid molecule, steroids have 17 carbons, making them a group of physiologically important lipids.Cheesegcc.com forms hormones in the animal's body and sterol molecules.Steroid molecules are the building blocks for hormones like testosterone and estradiol.

Molecules like cholesterol are sterols, which are actually types of steroids.Molecularly, cholesterol consists of a hydrocarbon tail attached to a hydroxyl group surrounded by a ring structure.

This molecule is also an important constituent of cell membranes, which is found at various points among phospholipids, where it influences the fluidity of the membrane.

The cholesterol molecule is also involved in bile acid formation as a precursor molecule.In order to digest fats, animals need to produce bile.

Waxes

The waxes are fatty acids attached to alcohol groups, and they are insoluble in water.The result is that they act as good waterproofing layers for organisms, such as plants and insects.

The epidermis of plants is lined with wax, as is the cuticle on the integumsaycheesegcc.comt of an insect.One reason why insects are so successful is due to the characteristics of their integumsaycheesegcc.comt.

Since this layer of wax reduces the loss of water from the body, these animals are able to colonize evsaycheesegcc.com dry habitats.

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