question

Lobbyist

answer

Contracting a public official - to persuade the official to support the groups interest

question

Semi-solid tryptone soy broth is used for growing bacteria in Petri dishes.

answer

false

question

Pure colonies can develop from one single bacterial cell or a colony forming unit.

answer

true

question

Broth tubes can be used to exhibit morphology features such as color, texture, andelevation.

answer

false

question

An organism that can survive in a pH of 2 would be called a neutrophile.

answer

false

question

Anaerobes can be found in the soil and can cause human infections.

answer

true

question

A differential medium enables you to tell the difference between bacteria and viruses.

answer

false

question

Fungal spores would be able to withstand 100C heat, just like bacterial endospores can.

answer

false

question

Fungi that can cause human disease include the genera Trichphyton and Candida.

answer

true

question

Nonhalophile bacteria would burst when exposed to 15% salt (NaCl) concentration.

answer

false

question

All disinfectant chemicals are as potent against gram positive organisms as they areagainst gram negative organisms.

answer

false

question

Which of the following techniques would not exhibit motility:

answer

negative stain

question

A good selective medium used to grow molds would be:

answer

Sabourauds Agar

question

Pellicles, turbidity, and flocculent formations of bacteria can be seen in:

answer

broth tubes

question

The motility test medium is:

answer

an agar deep with TTC

question

Thioglycollate added to a culture tube would:

answer

act to create anaerobic conditions

question

Which of the following is true concerning agar (agar-agar):

answer

Is dissolved into media by warming and stirring.

question

Gram positive bacilli:

answer

Include disease causing members such as tetanus and anthrax.

question

Which of the following is not usually observed on agar plates:

answer

turbidity

question

Flagella found all over the cell is an arrangement called:

answer

amphitrichous

question

Molds are characterized by

answer

Type of asexual spore.

question

A complex culture medium for bacteria, would be similar to hot dogs for humans (hot dogs are made out of a mix of meats, and rarely do we know exactly what’s in them).

answer

true

question

A rodac plate is normally inoculated by means of sterile swabs.

answer

false

question

The hanging drop procedure involves the use of a plain glass slide, a cover slip, and adrop of liquid.

answer

false

question

Anaerobes can grow in all the following except:

answer

Candle jars

question

When a methylene blue pad is placed in an anaerobe jar and it turns blue, this would mean:

answer

that the system did not work and air is still present.

question

Brownian movement is seen as a purposeful darting motion which is caused by tiny bacterial pili.

answer

false

question

Ubiquitous means:

answer

microbes

question

A pure culture is the same as an isolated mixed culture.

answer

false

question

A disinfectant that is bacteriocidal will only stop the growth of bacteria, and won’t kill it.

answer

false

question

Which of the following is true of disinfectants?

answer

They are important to use when handling food, in order to avoid contamination with Salmonella, Clostridium, E. coli, or other food spoilers.

question

Increased UV exposure to bacteria causes higher rates of cell death, because UV light causes:

answer

pyrimidine (thymine) dimers

question

Gram positive cocci are commonly found on toilet seats and chairs becausecommon skin commensals.

answer

true

question

All motile bacteria produce a red pigment that turns motility deeps red when they move.

answer

false

question

Bacteria that can grow well from 0C up to 15C, but do not grow at higher temperatures, would probably be classified as

answer

psychrophiles

question

Drastically increased temperature and drastically acidic or basic pH, for organisms considered meosphiles and neutrophiles, would have what effect?

answer

cause denaturation of proteins, enzymes, and membranes

question

Which of the following is true of disinfectants?

answer

can be evaluated by immersing a disk in the disinfectant, placing it on a lawn of bacteria, and measuring the inhibiting of growth around the disk after incubation.

question

List and describe two methods to grow anaerobes

answer

anaerobic chamber, anaerobe jar

question

while anaerobes cannot survive in oxygen

answer

do not possess the defenses that make aerobic life possible and therefore cannot survive in air

question

What makes aerobes able to survive in oxygen

answer

The excited singlet oxygen molecule is very reactive. Therefore, superoxide must be removed for the cells to survive in the presence of oxygen.

Microbiology Lab Practice Test – Flashcards

Unlock all answers in this set

Haven't found what you were looking for?

Search for samples, answers to your questions and flashcards