Question

The following table shows several bacterial strain lacoperon genotypes (some are partial diploids).

a) Fill in the blanks in the “lactose absent” and “lactosepresent” columns in this table. (+) means significant levels ofactive ß-galactosidase enzyme can be detected. (–) meansno significant levels of active ß-galactosidase enzyme.The first line is filled in for reference.

Strain genotype	Lactose absent	Lactose present
1. lacI+ lacP+ lacO+lacZ+ lacY+
2. lacI+ lacP+ lacOclacZ+ lacY+
3. lacI+ lacP+ lacOclacZ–lacY+
4. lacIs lacP+ lacOclacZ+ lacY+
5. lacI–lacP+lacO+ lacZ+ lacY+ /lacI+
6. lacIs lacP+ lacO+lacZ+ lacY+/ lac I+

b) If lactose is absent and glucose is present in the culturemedium of strain 4, will significant levels of activeß-galactosidase enzyme be detected? Explain… in brief, just becausethere is lots of room left, you don’t need to fill it.