Which of the following is a facultative, rather than obligate, intracellular pathogen?
A. Rickettsia
B. Brucella
C. Chlamydia
D. All of the choices are correct.
Answer: B
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DNA fragments can be separated in gel electrophoresis because
A. nitrogenous bases have a net negative charge. B. phosphate groups have a net negative charge. C. nitrogenous bases have a net positive charge. D. phosphate groups have a net positive charge.
Species interactions within a community rarely involve only two species
Indicate whether the statement is true or false
A genomic library is a collection of ________ that contains DNA fragments representing most, if not all, of the genome of an organism
Fill in the blank with correct word.
During what step of glycolysis are two ATP molecules required?
A. Oxidation B. Acetyl-CoA formation C. Pyruvate formation D. Glucose priming E. Cleavage and rearrangement