If a certain water-soluble, intravenous antibiotic is not succeeding in defeating the germs inside the central nervous system, the ________ may be preventing the antibiotic from reaching the brain

Fill in the blank(s) with correct word


blood-brain barrier

Biology & Microbiology

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Inserting a kanamycin resistance cassette into a catabolic operon to confirm the gene is essential in degradation of a particular compound would involve all of the following EXCEPT

A) a reporter gene. B) ligation. C) recombination. D) transformation.

Biology & Microbiology

Antibody molecules ____

a. are secreted by B cells and T cells b. stay attached to the B cell membrane as B cell receptors c. inactivate complement proteins d. prevent phagocytosis e. can each bind to many different antigens

Biology & Microbiology

The notion that landscapes are continually changing through time is often called

A) a shifting mosaic. B) a metacommunity. C) island biogeography. D) corridor dynamics.

Biology & Microbiology

The most common form of spontaneous replication error is

A) tautomeric shift. B) double-stranded DNA breaks. C) thymine dimer addition. D) base analogue addition. E) DNA intercalation.

Biology & Microbiology