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:
Answers – Apnea; Ectopic
Apnea refers to suspension of breathing, so to have no
breathing is termed apnea. Ectopic
pregnancy (also known as tubal pregnancy means pregnancy that takes place (i.e.
an embryo implanted) in an abnormal place, in this case the fallopian tube.
0%. Fungi are heterotrophs, meaning that they get their food from elsewhere instead of making it themselves.
The butterfly finds flowering plants for nectar in the meadow. In the process of sucking nectar, they pollinate the plants. The meadow plants such as grasses, forbs and sedges plants provide food for field mice that eat their leaves , roots, and bulbs. The mice also create burrows in the meadow where they breed their young. This, therefore, provides a good hunting ground for owls that prey on mice.