When a vector that employs the lacZ gene as a second marker is used in a cloning experiment, bacteria that harbor the recombinant DNA will give rise to

A. red colonies.
B. white colonies.
C. blue colonies.
D. All of the choices are correct.


B

Biology & Microbiology

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During crossing over in meiosis, an incomplete exchange of genetic material occurs. This would most likely produce

A. a deficiency in one homologue and a duplication in the other homologue. B. a deficiency in both homologues. C. a deficiency in one homologue and an inversion in the other homologue. D. a reciprocal translocation. E. a duplication in one homologue and an inversion in the other homologue.

Biology & Microbiology

Within one or two weeks after infection with Plasmodium, ruptured liver cells release _____ and cellular debris into

the host's bloodstream, causing fever and weakness characteristic of malaria. a. sporozoites b. merozoites c. Anopheles mosquitoes d. gametocytes e. zygotes

Biology & Microbiology

All of the following act as surfactants except ________.

A. soaps B. iodine C. alcohols D. quaternary ammonia E. detergents

Biology & Microbiology

Of the following choices, the epithelium with the shortest diffusion distance is _____

A) simple squamous epithelium B) simple columnar epithelium C) pseudostratified ciliated columnar epithelium D) stratified squamous epithelium

Biology & Microbiology