Biol 251 Most Commonly Missed Exam Question

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Streptococcus lacks an electron transport chain. How will this organism reoxidize NADH?

fermentation

A drug that prevents ATP generation in mitochondria would be most effective against

fungi

If an antibiotic attacks the lipopolysaccharide layer, it would

have a narrow-spectrum of activity against only Gram negative cells.

Which of the following statements about generalized and specialized transduction are TRUE?

-Specialized transduction is initiated by a lysogenic bacteriophage. -Generalized transduction is initiated by a lytic bacteriophage. -In generalized transduction, the DNA of the donor bacterial cell is broken into pieces and any of these pieces may be transferred to the recipient cell. -In specialized transduction, a small piece of bacterial DNA is packaged into the phage capid with the viral DNA and only chromosomal DNA adjacent to the prophage region may be transferred to the recipient cell.

Which of the following molecules are produced by noncyclic photophosphorylation, but NOT by cyclic photophosphorylation?

NADPH and O2

Bacteria such as E. coli and Salmonella produce invasins that bind to host cells, thus causing the host cells to

engulf the bacteria

An inactivated form of the botulinum toxin is used in a(n)

toxoid vaccine


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