Please answer questions 1,2,3 and ignore 4 and 5. If you do not know the answer please do not respond, I do not want my points wasted. (Will give brainliest if you help)

How does the study of genetic disorders such as pku biologists understand normal alleles?

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

What best explains whether bromine (br) or neon (ne) is more likely to form a covalent bond? bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule. bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons. neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron. neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.