1.Operons with an active repressor need to be turned ON/OFF (circle choice). 2.Transcription is normally ON/OFF (circle choice). Transcription is normally Blocked
3.When would it be beneficial for bacteria to produce enzymes to digest lactose?

1.Operons with an inactive repressor need to be turned ON/OFF (circle choice).
2.Transcription is normally ON/OFF (circle choice). Transcription is normally Occurring.
3.When would this be beneficial for a cell to have an operon whose Default position is on?
4.When would it be beneficial for the bacteria to NOT produce enzymes that make tryptophan?

Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?