LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which physical characteristic is not commonly used in protein separation?
A
solubility
B
stereochemistry
C
size
D
charge
E
polarity
Explanation: 

Detailed explanation-1: -Proteins are separated on the basis of differences in their physicochemical properties, such as size, charge, adsorption characteristics, solubility and heat-stability.

Detailed explanation-2: -Two chromatographic methods are frequently used for protein or (more often) peptide separation. High-performance liquid chromatography (HPLC) can be used to separate and to purify proteins/peptides based on size, charge or overall hydrophobicity.

Detailed explanation-3: -Adsorption chromatography is not widely used in protein purification. Hydroxyapatite is an example of a stationary phase that is sometimes used to analyze either proteins or nucleic acids. Ion exchange chromatography (IEC) is a specific type of adsorption chromatography based upon charge-charge interactions.

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