Which methods separate proteins based on their charge? sds-page isoelectric focusing ion-exchange chromatography affinity chromatography i and ii only ii and iii only i, ii, and iii only ii, iii, and iv only

Isoelectric focusing Ion-exchange chromatography.

Explanation:

Proteins are the polymers made of the monomers of the alpha amino acids linked through the peptide bond. The proteins may be neutral as well some contains the charge over them.

The proteins on the basis of the charge can be separated by ion exchange chromatography and isoelectric focusing. These techniques have different solutes and solvents that separate proteins on charge basis. SDS-PAGE separates the protein on their weight and Affinity chromatography separates protein on their binding with ligand.

Thus, the answer is  only II and III .

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.