Describe the basic structure of a hydrocarbon and explain why these molecules are hydrophobic?
Hydrocarbons = Molecules containing only carbon and hydrogen
- Are major components of fossil fuels produced from the organic remains of organisms
living millions of years ago, though they are not prevalent in living organisms.
- Have a diversity of carbon skeletons which produce molecules of various lengths and
- As in hydrocarbons, a carbon skeleton is the framework for the large diverse organic
molecules found in living organisms. Also, some biologically important molecules may have
regions consisting of hydrocarbon chains (e.g. fats).
- Hydrocarbon chains are hydrophobic because the C-C and C-H bonds are nonpolar.
water molecules move with the help of membrane proteins called aquaplane's, which regulate the movement of water in an out of the cell. Because of the dual nature of the membrane (hydrophobic and hydrophobic, water doesn't simply diffuse in an out, although a certain percentage can slip in between phospho lipids.
Describe the structure of water molecules and explain what properties emerge as a result of this structure?
"Like Dissolves Like" is a concept in chemistry discribing hydrophobic (nonpolar) and hydrophilic (polar) interactions. Polar molecules, in order to reduce unfavorable interactions that require free energy to compensate for, tend to associate with other polar molecules. Non-polar molecules, likewise, associate with other nonpolar molecules. The terms hydrophobic and hydrophilic are used to describe a molecules tendency to associate with water. Polar molecules, using the "like dissolves like" concept associate with water, while nonpolar molecules…
Describe how the diffusion of ions across a cell membrane differs from the diffusion of nonpolar molecules across the cell membrane?
Ions need to be facilitated through a cell membrane because they are passing through a phospholipid bilayer with a hydrophobic interior. Non-polar molecules are also hydrophobic, so they can pass through the membrane easily if they are small enough. Ions are polar, so they have a hard time passing through membranes.
The most notable characteristic is amphipathicity, meaning it is hydrophilic on one end and hydrophobic on the other. This allows it to form a bilayer, of which cell membranes are made. If a molecule were to cross through the membrane, it would need to diffuse through a hydrophilic region, a hydrophobic region, and another hydrophilic region, which is difficult for most molecules. This is why the phospholipid bilayer is a good way to separate a…
Atoms, molecules, organelles, cells, tissues, organs, organ systems, organism. Each structure contains the structure before it. An organism is made up of organ systems, an organ system is made up of organs, organs are made up of tissues, cells are made up of organelles, organelles are made up of molecules, and molecules are made up of atoms.
When phospholipid molecules are placed in water they form bilayer membranes Describe what you think happens to cause the formation of the bilayer membranes?
Enzymes are almost all proteins. They are often globular proteins. We can describe them in terms of their primary, secondary, tertiary and quaternary structure. They are long chains of amino acid units held together by peptide bonds, looped and folded into secondary and tertiary structures by disulfide bonds, hydrophobic interactions, and salt bridges.
It depends on the physical properties of the substance. Sometimes heating a hydrophobic substance can increase solubility. Also, heating may cause the substance to denature and dissolve. In the case of proteins, proteins can contain many hydrophobic parts but still be soluble in water. However, hydrophobic substances do not typically dissolve in water, due to the polar nature of water. Typically, scientists use the word "hydrophobic" only to describe substances that have a negligible solubility…