Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier?

A) producing fimbriae
B) inducing endocytosis
C) producing toxins
D) inducing TNF
E) antigenic variation


D

Biology & Microbiology

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To what group did the earliest fossils of eukaryotes belong?

A. green algae B. red algae C. diatoms D. coccolithophorid algae E. dinoflagellates

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Which molecule is the most abundant in the extracellular matrix of connective tissues?

a. collagen b. cholesterol c. fibronectin d. albumin e. elastin

Biology & Microbiology

Which chromosomes are carried by a normal female bird?

Biology & Microbiology

When a DNA sequence is transferred into a host cell from another cell, the resulting new form of DNA is called 

A. a clone. B. GM organism. C. recombinant DNA. D. plasmid.

Biology & Microbiology