Biology Chapter 6 (Mastering Microbiology)

Which of the following is an example of a biofilm? bacteria present in the bloodstream bacteria growing on nutrient agar bacteria growing in nutrient broth bacteria growing in plaque

Which of the following bacteria has an affinity for the heart valves? Bacillus subtilis Staphylococcus aureus Streptococcus mutans Bordetella pertussis

Which nutrient is responsible for the development of cavities in teeth? cholesterol sucrose sorbitol albumin

Why is Daniel underweight? Daniel is not eating very much, because he likes scrambled eggs, which are high in fat. Daniel is not eating much, because it hurts to chew and swallow. Daniel is not eating much, because candy is very filling. Daniel is not eating much, because pudding is high in sugar.

Which of the following terms is likely to describe optimal growing conditions for Streptococcus mutans? psychrotroph mesophile thermophiles halophile

Which of the following represent the majority of pathogenic bacteria? psychrophiles hyperthermophiles thermophiles mesophiles

Nitrogen is a growth-limiting nutrient because cells need it to manufacture __________. proteins and lipids proteins and nucleotides lipids and carbohydrates carbohydrates and nucleotides

A colony-forming unit is a __________. tool used to collect clinical specimens commonly used isolation technique special type of growth medium single cell or group of related cells that gives rise to a colony

What results when a single bacterium reproduces? One parent cell and a genetically identical daughter cell Two genetically identical daughter cells One parent cell and a genetically different cell Two genetically unique daughter cells

If you begin with six cells, how many cells would you have after three rounds of division? 12 cells 9 cells 18 cells 24 cells 48 cells It is impossible to determine.

Which of the following is NOT a step in bacterial cell division? Replication of the genetic material Splitting apart of two new daughter cells Disappearance of nuclear envelope Cell elongation

Which step of binary fission is the reason for genetically identical daughter cells? Elongation of the cell Splitting of the two daughter cells Replication of the bacterial chromosome There are four new daughter cells that result from one parental cell

What does halophilic mean? It means the organism grows at body temperature. It means the organism grows well in an acidic environment. It means the organism is "salt-loving." It means the organism's colonies are yellow in color.

What does the term facultative anaerobe mean? Facultative anaerobes can grow with or without oxygen. More growth is evident when oxygen is present. Facultative anaerobes require oxygen for growth. Facultative anaerobes will grow only in the presence of nitrogen gas. Facultative anaerobes cannot grow in the presence of oxygen.

What does the term mesophile mean? Mesophiles grow well at 85 degrees Celsius. Mesophiles grow well at body temperature. Mesophiles grow well at 55 degrees Celsius. Mesophiles grow well at refrigerator temperatures.

Which organism is most likely to be responsible for the boils? Staphylococcus aureus Escherichia coli Staphylococcus epidermidis Bacillus cereus

What is a boil? A boil is a series of clear fluid-filled blisters. A boil is a painful, raised, red rash affecting a great portion of skin surface area. A boil is a flat, red rash affecting a great portion of skin surface area. A boil is a red lump in the skin that may be warm and painful to the touch. It is a localized accumulation of pus and tissue debris.

Agars can be used to select for growth of certain types of bacteria and then allow for you to identify the different bacteria that can grow on the plate. These agars may be considered both selective and differential.

Which of the following statements correctly summarizes the enzymatic reactions to reactive oxygen species?