If a cell has the partial diploid genotype lacI+ lacO- lacZ+ lacY+ ______________________ lacI- lacO- lacZ+ lacY- , how will its gene expression function in the presence of allolactose?

Fill in the blank(s) with correct word


In this construct, lacI+ gene is dominant over lacI-, which means repressor protein is produced. Both copies of the operator are defective, however, and the repressor cannot bind to it. The structural genes will therefore be constitutively produced.

Biology & Microbiology

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An unknown organism from an alien planet is observed and found to have a diploid state in every other generation that

results from fertilization. The haploid state is able to grow into a gametophyte-like structure. This alien organism most closely mimics the life cycle strategy of which of the following earth organisms?

a. humpback whale b. chimpanzee c. algae d. bacteria e. all plants and some fungi

Biology & Microbiology

Four of the five choices listed below are therapeutic

measures applied to affected individuals. Select the exception. a. prenatal diagnosis b. chemotherapy c. surgical correction d. diet modification e. hormone replacement therapy

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Which of the following proteins are involved in binary fission as well as eukaryotic mitotic division?

A) cyclins B) Cdks C) MPF D) actin and tubulin E) cohesins

Biology & Microbiology