Test 01

Which of the following occurs during assembly of an enveloped virus?

A nucleocapsid is formed and viral spikes insert in host cell membrane

Endospores are ________

All of the choices are correct.

_____ Manual of Systematic Bacteriology is a manual of bacterial descriptions and classifications

Bergey's

Which is mismatched?

Plasmodium—protozoan that causes Chagas disease

The Nobel Prize was awarded to Kary Mullis in 1993 for inventing what technique to amplify and subsequently analyze DNA?

Polymerase chain reaction

Stages of binary fission in the correct order

Replication of the chromosome, formation of central protein band, septum divides daughter cells

Which of the following pairs is mismatched?

Secondary infection - infection spreads to several tissue sites

Which of the following statements is not true regarding the differences between bacteria, archaea, and eukaryotes?

The cell walls of bacteria and archaea both contain the complex macromolecule peptidoglycan, whereas only the organisms in kingdom Plantae contain cell walls, which are made of cellulose.

The all-purpose media Tryptic Soy Agar (TSA) contains the following four ingredients; pancreatic digest of casein, digest of soybean meal, NaCl and agar. TSA is best described as

a complex media

87 people developed diarrhea, fever and abdominal cramps in the aftermath of a wedding. On diagnosis it was determined that they were suffering from salmonella, and after taking their histories, they all reported that they had eaten the chicken at the reception. This is an example of

a point-sourced epidemic

Which of the following will result when 1% to 5% agar is added to nutrient broth, boiled and cooled?

a solid medium

A halophile would grow best in________

acid pools

Protozoan cysts ________

are helpful in surviving unfavorable conditions.

All of the following pertain to virus envelopes except ________

are located between the capsid and nucleic acid

The two functions of bacterial appendages are _______

attachment and motility

The human body typically begins to be colonized by its normal biota

before birth, in utero

Persistent viruses that can reactivate periodically are _____

chronic latent viruses

Eukaryotic flagella differ from bacterial flagella because only eukaryotic flagella

contain microtubules

The microorganisms that recycle nutrients by breaking down their dead matter and wastes are called

decomposers

When would Koch's postulates be utilized?

determination of the cause of a new disease in a microbiology research lab

The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called _____

diffusion

Atoms and molecules are in constant, random motion. Movement of any molecule along its concentration gradient is termed _____, and movement of water in the same manner, across a selectively permeable membrane, is called _____

diffusion; osmosis

The core of every virus particle always contains _____

either DNA or RNA

Which type of microscope achieves the greatest resolution and highest magnification?

electron

Which type of microscope does not use light in forming the specimen image?

electron

An infectious agent that originates from outside the body is called _____

exogenous

Bacteria that require special growth factors and complex nutrients are termed

fastidious

Viruses attach to their hosts via ________

host glycoproteins

Larval development of helminths occurs in which host?

intermediate (secondary) host

Which of the following does not pertain to endotoxin?

it is found in acid-fast bacterial cell walls

Microorganisms require large quantities of _____ for use in cell structure and metabolism.

macronutrients

Human pathogens fall into the group termed _____

mesophiles

The effect of "good" microbes against invading microbes is called

microbial antagonism

There a nine peripheral pairs and one central pair of ________ found inside eukaryotic flagella and cilia

microtubules

Which organelle contains cristae where enzymes and electron carrier for aerobic respiration are found?

mitochondria

Cells grown in culture form a(n)

monolayer

A client has a serious case of the flu. A random sample of sputum was taken from the patient coughing up blood. The lab tech said they had isolated a bacterium that did not have nay peptidoglycan. You hypotesize that the identity of this microbe could possibly be

mycoplasma pneumoniae

Spirochetes have a twisting and flexing locomotion due to appendages called _____

periplasmic flagella (axial filaments)

Cells, like bacteria and archaea, that do not have a nucleus in their cells have traditionally been called

prokaryotes

When buds remain attached, they form a chain of yeast cells called

pseudohyphae

The alpha helix is a type of _____ protein structure

secondary

Long-term or permanent damage to tissues or organs resulting from a specific disease are called _____

sequelae

The transfer of genes during bacterial conjugation involves rigid, tubular appendages called _____

sex pili

The objective, measurable evidence of disease evaluated by an observer is termed a(n) _____

sign

The smallest and most significant taxon is _____

species

A chain of rod-shaped cells would be called a

streptobacillus

The first primitive eukaryotic cells likely evolved from

the last common ancestor

Infectious naked strands of RNA that affect plants are called _____

viroids

The development of antiviral drug therapy is difficult because ________

viruses are obligate intracellular parasites so the host cell can be harmed by the drug.

The outcome of the Gram stain is based on differences in the cell's

wall