Microbiology Chapters 4 & 7

Which structure is not a component of all cells?

A. Cell wall

Viruses are not considered living things because

D. All of these are correct (A. they are not cells, B. they cannot reproduce by themselves, C. they lack metabolism)

Which of the following is not found in all bacterial cells

D. Actin cytoskeleton

The major locomotor structures in bacteria are

A. Flagella

Pili are appendages in _______ bacteria that serve as a means of ________

C. Gram-negative, genetic exchange

An example of glycocalyx is

A. A capsule

Which of the following is a primary bacterial cell wall function

C. Support

Which of the following is present in both gram-positive and gram-negative cell walls

B. Peptidoglycan

Metachromatic granules are concentrated _______ found in _______

D. PO4, Corynebacterium

Which of the following prokaryotes lacks cell walls?

B. mycoplasmas

The LPS layer in gram-negative cell walls releases _________ that cause __________

B. endotoxins, fever

Bacterial endospores function in

B. survival

An arrangement in packets of eight cells is described as a ________

D. sarcina

The major difference between a spirochete and a spirillum is

C. the nature of motility

Which phylum contains bacteria with a gram-positive cell wall?

C. Firmicutes

To which taxonomic group do cyanobacteria belong?

C. Domain Bacteria

Which stain is used to distinguish differences between the cell walls of medically important bacteria?

C. Gram stain

The first living cells on earth would most likely resemble which of these?

D. an archaeon

Which is true of the condition endocarditis?

C. it is an infection of the heart valves and linning

Where did the MRSA pathogen likely originate?

B. from his earlier skin infection

An organic nutrient essential to an organism's metabolism that cannot be synthesized itself is termed a/an

C. growth factor

The source of the necessary elements of life is

A. an inorganic environmental reservoir

An organism that can synthesize all its requires organic components from CO2 using energy from the sun is a

A. photoautotroph

An obligate halophile requires high

C. salt

Chemoautotrophs can survive on _________ alone.

C. minerals and CO2

Which of the following substances are required by all organisms?

B. inorganic nutrients

A pathogen would most accurately be described as a

A. parasite

Which of the following is true of passive transport?

A. it requires a gradient

A cell exposed to a hypertonic environment will _________ by osmosis.

B. lose weight

Active transport of a substance across a membrane requires

B. the expenditure of ATP

Psychrophiles would be expected to grow

C. at a refrigeration temperatures

Which of the following is not involved in quorum sensing?

D. release of genetic material

Superoxide ion is toxic to strict anaerobes because they lack

C. dismutase

The time required for a cell to undergo binary fission is called the

C. generation time

In a viable plate count, each _____ represents a ______ from the sample population.

B. colony, cell

The stage in population growth with the highest rate of cell division is the

C. exponential phase

Which group are the dominant microorganisms in the Berkeley Pit?

C. algae

How can the microbes in the Berkeley Pit detoxify the water?

E. a, b, and c (A. by removing the heavy metals, B. by neutralizing the acidity, and C. by recycling elements)