An operon encodes enzymes for making an essential amino acid and is regulated like the trp operon. which of the statement is true?
a. the amino acid inactivates the repressor.
b. the amino acid acts as a corepressor.
c. inducible enzymes are produced.
d. the repressor is active in the absence of the amino acid.

Need will mark ! which features are created by groundwater erosion and deposition? check all that apply. a. stalagmitesb. sinkholesc. rillsd. stalactites e. gullies f. rivers

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.

What drives the atp synthase reactions that produce atp