Answer Happy

"The 4th wheel?" (3 pts.) Proteins rarely work alone and typically they may work in pairs, triplicate or in larger groups. The lac repressor which we have discussed in great detail is such a protein. Biochemical analysis of the lac repressor shows that it binds in groups of 4 meaning that it takes 4 lac repressor protein molecules to form a functional unit. The name given to proteins that work in groups of 4 is: (0.5 pt.) tetramer The name of the sequence that the lac repressor binds to in the lac operon is: (0.5 pt.) lac operator
"The 4th wheel?" (3 pts.) (cont'd) Those same studies resulted in the creation of new alleles of the lac repressor called / and/º. • The allele is called the "super-repressor". The mutation makes the repressor insensitive to lactose. This means that the repressor doesn't bind to lactose and does not change its configuration when lactose is present. All of its other functions are intact. • The I-d allele makes a "poison pill" because it encodes a version of the repressor that blocks the normal function of the 4 lac repressor complex even if the 3 other lac repressor molecules are functionally normal. Consider the partial diploids below. State whether you would expect to observe (YES) or not observe (NO) expression of functional B- galactosidase and permease proteins in each cell. Please use the example shown below as a model for how to answer this completely to obtain full points. If you are still confused as to how this question should be answered please ask for assistance. Note: Absolutely no partial credit for improperly phrased responses! (2 pts, 0.25 pts. Ea.) Partial Diploid I+P+0+Z+Y- 2: I-P+OcZ-Y- F'I+P+O+Z+Y+ Y: I-P+OcZ-Y+ F'ISP+O+Z+Y- Glucose present Lactose present Z: NO, Y: NO خونه 12: ISP-O+Z+Y- F'I-dp+OcZ-Y+ |V: I-dp+0+Z-Y- 2: F'I+P+OCZ+Y+ Y: Glucose absent Lactose present Z: YES, Y: NO Z: Y: ندنہ نونہ دنہ 2: