Direct participant observation claim that the researcher be physically present. This can cause the respondents to alter their actions in order to look in the eyes of the researcher.
Unobtrusive measures are measures that don't demand the researcher to intrude in the research context.
The pulmonary structures refers to the organs of the body that are involved in the breathing process. These include the nostril, the oral cavity, the trachea, the two lungs, etc. Humans take oxygen from the environment to facilitate the respiratory process, at the same time they release carbon dioxide to the environment using the pulmonary structures.
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c. step my step explanation
The vas deferens transport sperm from the testicle to the urethra.
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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:
