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Why are acidic amino acids negatively charged and vice versa i thought adding H plus ions to make it acidic would make it positive?
Wiki User
∙ 13y ago
Not when you donate those ions in solution as acids do.
Wiki User
∙ 13y ago
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Difference between basic and acidic stains?
Acidic oxides form acids with water: eg SO2 + H2O --> H2SO3 Basic oxides form basic salts (alkaline) with water: eg. CaO + H2O --> Ca(OH)2 Amfotheric oxides have both acidic and base properties: eg. Aluminium oxide is an amphoteric oxide, which means that it displays both acidic (1) and base (2) properties: 1. Al2O3 + H2O --> 2 Al(OH)2- + 2 H+ 2. Al2O3 + H2O --> 2 Al3+ + 3 OH-
Is coffee alkalyne or acidic I thought it was acidic but a chemist told me that coffee is an alkaloid?
Coffee is a plant product, not a chemical alkaloid. It contains caffeine, which is an alkaloid. Coffee is slightly acidic, but not as acidic as soda, beer, etc.
Is burned leaf ash acidic or alkaline?
Alkaline - thought everyone knew that!
Which forms the positive ions in salt the acid or the base?
The Acidic Ion called the Cation.
Is soap solution is acid or base or neutral?
Soaps are basic. Basic cleaners are often formulated to remove greasy materials. They are readily broken down by bases. In addition, many detergents are slightly or fairly basic because that's how they have an affinity for water. Detergent molecules contain one end that is attracted to water and another that is attracted to stuff like grease more than to water. They gather greasy ends around greasy dirt and allow it to be suspended in water. The water-loving end can be positively charged, negatively charged, or neutral but polar. It is especially easy to make negatively charged ends by making the conjugate base of a strong or weak acid, which results in a weak or strong base.
Bacterial cell Acidic dyes carry what charge?
They carry negative charge and are repelled by negatively charged cell structures. Basic dyes are opposite (carry positive charge) and are attracted to negatively charged cell structures.
Why an acidic stain is used in negative staining?
Acidic dyes are negatively-charged dyes. Since bacteria are also negatively-charged, they will repel the acidic dyes. So, instead of staining the bacterium itself, it will be the background that will be colorized....
Why are negatively charged amino acids acidic?
Negatively charged amino acids are acidic bacause they gave a proton (H+) to the solution. The amino acid was not charged before it went into the solution, but lost a hydrogen when placed in water and became negativley charged. It also donated a proton to the solution so it is considered acidic. Similar logic applies with the basic amino acids.
What is the difference between acidic dye and basic dye?
basic dyes are more effective for bacterial staining than acidic dyes because basic dyes have a positive charged chromogen. Bacterial nucleic acids and certain cell wall components carry a negative charge that strongly binds to the cationic chromogen.
Acidic Congo red does not contain carbon particles like Nigrosin but can give the appearance of a negative stain What is the basis for this stain?
Acidic Congo red is negatively charged, so it is repelled by the negatively charged cytoplasm, and gathers around the cell wall instead, leaving the cell clear and unstained.
Where histamine is found in human body?
Histamine is found in the granules of mast cells where it is bound with an acidic protein and heparin(positively charged) while histamine itself is negatively charged.
Why does DNA wraps around histone?
DNA has a net negative charge (which is due to the phosphate backbone) and is Acidic nature and histones which have a pI of ~10 are basic and overall have a positive charge (histones are right in argenines and lysines). Opposites attract, + and - are attracted. :) hope this helps
How do you know if an amino is acidic?
If they are negatively charged above pH 3. These amino acids are aspartic acid and glutamic acid. In their ionized state, they are often referred to as aspartate and glutamate.
Why amino acids exists as zwiter ion?
It is an ion with overall neutral charge.But in its chain , there exists two parts where one part has a negative charge and another side has an equal positive charge to nullify the negative charge. This ion becomes positively charged in acidic medium and negatively chargedin alkaline medium. Eg amino acids etc.
What are some items that have a great concentration of H ions?
H ions are charged particles of Hydrogen. By charged, I mean it has either a positive or negative overall charge, caused by the addition of an electron (negative) or the subtraction of one (positive). Generally, it will be an H+ ion, which itself is simply a proton.
Could a negatively charged dye stain a bacteria?
The effect on the bacteria depends if the stain is an acidic or basic stain. Most bacteria are stained when a basic stain permeates the cell wall and adheres by weak ionic bonds to the bacterial cell, which is slightly negatively charged.
Staining preparation with eosin and methylene blue?
Eosin is a red stand and methylene blue is blue. The result of staining a bacterial smear with a mixture of eosin and methylene blue is that eosin is acidic and acts as a negative stain. Methylene blue is basic the smear background would turn out red while the cells would turn out blue.
