Consider an experiment in which an Hfr strain of E. coli bacteria with the StrS, his+, met+ alleles in its genome is mixed with an F- strain of E. coli with the StrR, his-, and met- alleles in its genome. After the cells have been cultured together for 8 hours, the mixture of cells is plated on minimal media containing Streptomycin.
1. Which genotype do you expect to be most common among the colonies that grow?
O F+: StrR, his+ and met+
O F-: StrR, his- and met-
O Hfr: StrR, his+ and met+
O F-: StrR, his+ and met+
O F+: StrR, his- and met-

F-: StrR, his+ and met+

Explanation:

Since it is stated that the minimal media contains Streptomycin, therefore:

a.) To be able to grow on this media, the E. coli genome must have StrR allele.

b.) Also remember that only prototrophs can grow on minimal media, thus colonies with mis+ and met+ (which are prototroph) will be the common growth .

c.) In the conjugation of F- strain with an Hfr strain,  F- which contains  the StrR allele do not and cannot form F+ or Hrf strains but remains F-

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.  

1. what is the relationship between the shape of an enzyme and the reactions they catalyze?

2. how does an enzyme inhibitor work?

separate your answers so i dont get confused : )