Match the following items with the correct phrases.
_______1. _______________ is a common cause of subacute bacterial endocarditis (SBE) and a less common cause of cystitis.
_______2. Certain strains of _______________ are the so-called flesh-eating bacteria.
_______3. _______________ is a common cause of bacterial pneumonia, meningitis, and otitis media.
_______4. _______________ is the most common cause of toxic shock syndrome.
_______5. _______________ is one of the most common causes of neonatal meningitis.
A) Staphylococcus aureus
B) Staphylococcus epidermidis
C) Streptococcus agalactiae
D) Streptococcus pneumoniae
E) Streptococcus pyogenes
1. B) Staphylococcus epidermidis
2. E) Streptococcus pyogenes
3. D) Streptococcus pneumoniae
4. A) Staphylococcus aureus
5. C) Streptococcus agalactiae
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The production of ________ by ________ is thought to be a major contributor to the biodeterioration of stone building materials
A) oxalic acid / fungi B) sulfuric acid / sulfate reducers C) nitric acid / nitrate reducers D) carbonic acid / lichens
The deep-sea vent hypothesis for the formation of prebiotic organic molecules is based on
A. temperature gradients of the hot water coming from the vents and cold ocean water. B. hot gaseous substances released from the vents. C. a buildup of radioactive substances around the vents. D. temperature gradients of the hot water coming from the vents and cold ocean water and hot gaseous substances released from the vents are correct answers. E. temperature gradients, proton gradients, and radioactive substances could all lead to the formation of prebiotic organic molecules.
Which of the following is a function of reverse transcriptase?
A. It functions as a ribonuclease to degrade the viral RNA once it has been copied into DNA. B. It functions as a DNA-dependent DNA polymerase. C. It functions as a RNA-dependent DNA polymerase. D. All of these are functions of reverse transcriptase.
The purpose of a mordant in the Gram stain is
a. To make the flagella visible. b. To remove the simple stain. c. To make gram-negative cells visible. d. To make the bacterial cells larger. e. To prevent the crystal violet from leaving the cells.