are acetyl groups hydrophilic or hydrophobic?
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Functional groups can be classified as hydrophobic or hydrophilic based on their charge and polarity characteristics. The only hydrophobic group below is the methyl (CH 3​start subscript, 3, end subscript) group, which is nonpolar.
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They are hydrophobic. About 5 amino acids have polar side chains, R-groups which do not ionize or become positively or negatively charged. These R-groups are neither strongly hydrophilic nor hydrophobic. Atoms in long molecules, such as polypeptides, are not rigidly fixed in space or position.
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In phospholipids, the two fatty acids are hydrophobic, or insoluble in water. But the phosphate group is hydrophilic, or soluble in water. When phospholipids are mixed with water, they spontaneously rearrange themselves to form the lowest free-energy configuration.
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Classifying Functional Groups Functional groups are usually classified as hydrophobic or hydrophilic depending on their charge or polarity. ... Among the hydrophilic functional groups is the carboxyl group found in amino acids, some amino acid side chains, and the fatty acid heads that form triglycerides and phospholipids.
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In chemistry, water is considered to be the universal solvent, and materials that are hydrophilic can dissolve in it. Hydrophobic molecules, however, do not dissolve in water.
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For example, based on the propensity of the side chain to be in contact with water, amino acids can be classified as hydrophobic (low propensity to be in contact with water), polar and charged (energetically favorable contact with water). ... When both groups are protonated, the side chain has a charge of +1.
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Two functional groups containing oxygen, the hydroxyl and carbonyl groups, contribute to water solubility. ... Hydroxyl groups have one hydrogen paired with one oxygen atom (symbolized as -OH). Hydroxyl groups are not highly reactive, but they readily form hydrogen bonds and contribute to making molecules soluble in water.
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Phospholipids are soluble in both water and oil (amphiphilic) because the hydrocarbon tails of two fatty acids are still hydrophobic, but the phosphate group end is hydrophilic. Phospholipids are the major component of cell membrane to form lipid bilayers.
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Hydrocarbon is hydrophobic except when it has an attached ionized functional group such as carboxyl (acid) (COOH), then molecule is hydrophilic. Since cells are 70-90% water, the degree to which organic molecules interact with water affects their function.
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['hydrocarbon.', 'hydrophobic.', 'hydrostatic.', 'hydrophilic.', 'hydroponics.', 'hydroxyurea.', 'hydrolysate.', 'hydrography.']
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The carboxyl group is the head end, it is polar, and it will be attracted to water since it is hydrophilic. Are both ends of a fatty acid polar? ... No, only the carboxyl end is polar.
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Alcohols. Hydroxyl groups (-OH), found in alcohols, are polar and therefore hydrophilic (water liking) but their carbon chain portion is non-polar which make them hydrophobic. The molecule increasingly becomes overall more nonpolar and therefore less soluble in the polar water as the carbon chain becomes longer.
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Hydrophobic Amino Acids Amino acids are grouped according to what their side chains are like. The nine amino acids that have hydrophobic side chains are glycine (Gly), alanine (Ala), valine (Val), leucine (Leu), isoleucine (Ile), proline (Pro), phenylalanine (Phe), methionine (Met), and tryptophan (Trp).
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The structure of the phospholipid molecule generally consists of two hydrophobic fatty acid "tails" and a hydrophilic "head" consisting of a phosphate group. ... The phosphate groups can be modified with simple organic molecules such as choline, ethanolamine or serine.
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This term arises because hydrophobic molecules do not dissolve in water. If a molecule has areas where there is a partial positive or negative charge, it is called polar, or hydrophilic (Greek for "water-loving"). ... Some examples of polar covalent bonds often found in biological molecules include C-O, C-N and O-H bonds.
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Alkyl groups are non polar as there is negligible electronegativity difference between carbon and hydrogen.
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Hydrophilic means water loving; hydrophobic means resistant to water. 2. Hydrophilic molecules get absorbed or dissolved in water, while hydrophobic molecules only dissolve in oil-based substances. ... Hydrophilic molecules are polar and ionic; hydrophobic molecules are non-polar.