Answer:
Polypeptides are composed of amino acids, and we know amino acids are differently charged, have different R groups, and also have different isoelectric points. Depending on different isoelectric points and charged groups, the polypeptides can be separated and because a protein has its lowest solubility on its isoelectric point.
So in this question,
(a) (Lys-Ala)3 ; this is highly positively charged (polar) at pH 7 than (Gly)20 which is uncharged except for the amino and carboxyl terminal.
(b) (Glu)20 ; it is highly negatively charged at pH 7 whereas (Phe-Met)3 is much less polar and hence less soluble.
(c) (Asn-Ser-His)5 ; at pH 3, because in (Ala-Asp-Gly)5 the carboxylate groups of Asp residues are partially protonated and neutral, whereas in (Asn-Ser-His)5 , the imidazole groups of His residues are fully protonated and positively charged.
(d) (Asn-Ser-His)5; at pH 6.0; both polymers have polar Ser sidechains, but (Asn-Ser-His)5 also has the polar Asn side chains and partially protonated His side chains.
Explanation:
Answer:
The definition of energy is the ability to do work.
One way to think abnout is whenever you have a lto of eneergy you can do a lot of work, but with little energy you can't do much work.
Alfred Wegener suggested the Continental Drift Theory.
However, this idea was dismissed by scientists. Continental Drift Theory states
that all continents were once joined together then they drifted away from each
other. It was backed by maps which showed that if continents were pulled close
together would fit each other perfectly, just like in a puzzle. However
scientists from different fields resisted the idea and accused Wegener of not being an expert of science. The strongest reason of the
rejection, however, was that Wegener could not explain how continental drift
happened.
Acquisition of DNA. The transfer of genetic material between parent and offspring
