exam 2 review BIOL 2460

The term prokaryotes refers to which of the following?

unicellular organisms that have no nucleus

The term microbiota refers to which of the following?

all microorganisms in a certain region of the human body

Which of the following refers to the type of interaction between two prokaryotic populations in which one population benefits and the other is not affected?

commensalism

Which of the following describes Proteobacteria in domain Bacteria?

phylum

Which of the following Alphaproteobacteria is the cause of Rocky Mountain spotted fever and typhus?

Rickettsia

Class Betaproteobacteria includes all but which of the following genera?

Campylobacter

Haemophilus influenzae is a common cause of which of the following?

upper respiratory tract infections

Which of the following is the organelle that spirochetes use to propel themselves?

axial filament

Which of the following bacteria are the most prevalent in the human gut?

Bacteroides

Which of the following refers to photosynthesis performed by bacteria with the use of water as the donor of electrons?

oxygenic

Which of the following bacterial species is classified as high G+C gram-positive?

Corynebacterium diphtheriae

The term “deeply branching” refers to which of the following?

the position in the evolutionary tree of deeply branching bacteria

Which of these deeply branching bacteria is considered a polyextremophile?

Deinococcus radiodurans

Archaea and Bacteria are most similar in terms of their ________.

unicellular structure

Which of the following is true of archaea that produce methane?

They live in the most extreme environments.

Among prokaryotes, there are some that can live in every environment on earth.

true

Which genus includes the causative agent for malaria?

Plasmodium

Which protist is a concern because of its ability to contaminate water supplies and cause diarrheal illness?

Giardia lamblia

A fluke is classified within which of the following?

Platyhelminthes

A nonsegmented worm is found during a routine colonoscopy of an individual who reported having abdominal cramps, nausea, and vomiting. This worm is likely which of the following?

nematode

A segmented worm has male and female reproductive organs in each segment. Some use hooks to attach to the intestinal wall. Which type of worm is this?

cestode

Mushrooms are a type of which of the following?

basidiocarp

Which of the following is the most common cause of human yeast infections?

Candida albicans

Which of the following is an ascomycete fungus associated with bat droppings that can cause a respiratory infection if inhaled?

Histoplasma capsulatum

Which polysaccharide found in red algal cell walls is a useful solidifying agent?

agar

Which is the term for the hard outer covering of some dinoflagellates?

theca

Which protists are associated with red tides?

dinoflagellates

You encounter a lichen with leafy structures. Which term describes this lichen?

foliose

Which of the following is the term for the outer layer of a lichen?

the cortex

The fungus in a lichen is which of the following?

an ascomycete

The component(s) of a virus that is/are extended from the envelope for attachment is/are the:

spikes

Which of the following does a virus lack? Select all that apply.

ribosomes

metabolic processes

The envelope of a virus is derived from the host’s

membrane structures

In naming viruses, the family name ends with ________ and genus name ends with _________.

−viridae; −virus

What is another name for a nonenveloped virus?

naked virus

Which of the following leads to the destruction of the host cells?

lytic cycle

A virus obtains its envelope during which of the following phases?

release

Which of the following components is brought into a cell by HIV?

reverse transcriptase

A positive-strand RNA virus:

can be used directly to translate viral proteins.

What is the name for the transfer of genetic information from one bacterium to another bacterium by a phage?

transduction

Which of the followings cannot be used to culture viruses?

liquid medium only

Which of the following tests can be used to detect the presence of a specific virus?

all of the above

(EIA, RT-PCR, PCR)

Which of the following is NOT a cytopathic effect?

mononucleated cell

Which of these infectious agents do not have nucleic acid?

prions

Which of the following is true of prions?

They are a rogue form of protein, PrP.

True or False: Scientists have identified viruses that are able to infect fungal cells.

true