Microbiology Test 1 2nd Year PMU

Name the components of nutrient media

Most of the bacterial colonies are visualized after:

According to their cell wall structures bacteria divide into

Extra chromosomal genetic elements in bacteria are

How many phases have growth curve of bacteria? Ans: [blank_start]4[blank_end] Name them: a/ [blank_start]Lag[blank_end] Phase b/ [blank_start]Log[blank_end] Phase c/ [blank_start]Stationary[blank_end] Phase d/ [blank_start]Decline[blank_end] Phase

Sex-pili of bacteria helps for their

Name the three shapes of bacteria: a/ [blank_start]Round[blank_end] ([blank_start]Cocci[blank_end]) b/ [blank_start]Rods[blank_end] c/ [blank_start]Spiral[blank_end] ([blank_start]Spirilli[blank_end])

What is the most resistant to an unappropiate conditions bacterial form?

Which of the following bacterial structures prevents phagocytosis?

Are flagellas an obligatory structure of bacterium?

What chemical is responsible for the acid-fast property of mycobacteria? Ans: [blank_start]Mycolic acids[blank_end]

Name two bacteria that have capsules: a/ [blank_start]E. coli[blank_end] b/ [blank_start]Salmonella[blank_end]

In microbiology what is the most commonly used objective Ans: [blank_start]Oil[blank_end] Explain: This is because [blank_start]oil[blank_end] unlike other liquids like water has very [blank_start]little light refraction[blank_end]

What is the name of staining method for Corynebacterium diphtheriae?

Gram (+) bacteria are stained in [blank_start]blue[blank_end] colour and Gram (-) in [blank_start]red[blank_end] colour

The main taxonomic category for bacteria is

According Gram, the Gram (-) bacteria are stained in [blank_start]red[blank_end] colour

The unit for bacterial size is:

Vibrions are curved bacteria with

Ziehl-Neelsen is a staining procedure in:

Bacterial cytoplasm contains:

Name the purposes of simple staining: a/ Determine cell [blank_start]shape[blank_end] b/ Determine cell [blank_start]size[blank_end] c/ Determine cell [blank_start]arrangement[blank_end]

The main staining procedure that detect morphology of bacteria is:

The name Baccilus antracis defines certain bacterial

Is it true: Bacterial spores are formed in unfavorable conditions and are means of multiplying

Staining according Victoria blau is a [blank_start]simple[blank_end] method

Which of the following organelles are essential for bacteria?

What are the curved bacteria?

Diplococci are [blank_start]round[blank_end] shaped bacteria that are arranged in [blank_start]pairs[blank_end]

Staphylococci are round shaped bacteria arranged in [blank_start]clusters[blank_end]

The volutine bodies are inclusions in the cytoplasm of:

Where is lipopolysaccaride situated?

Name at least two rod-shaped bacteria a/ [blank_start]Bacillus anthracis[blank_end] b/ [blank_start]Clostridium tetani[blank_end]

How many spores form one bacteria?

Loefler technique stain bacteria in [blank_start]blue[blank_end] colour

The causative agent of tuberculosis is stained in red color, using [blank_start]Ziehl[blank_end] [blank_start]Neelsen[blank_end] (name the staining method)

What are the two purposes of heat fixation a/ [blank_start]kill[blank_end] organisms b/ allows stain to be [blank_start]absorbed[blank_end]

Each bacteria has two names and they define its

Bacteria cell is

Which of the following is NOT found in the cell wall of gram (-) bacteria?

Name the different types of bacteria pili and what are their function a/ [blank_start]common[blank_end] and its function is [blank_start]adhesion[blank_end] b/ [blank_start]sex[blank_end] and its function is [blank_start]conjugation[blank_end]

Loeffler stain requires

Which of the following methods of staining are complex

Bacterium Diphteri and its structure : [blank_start]Volutine granule[blank_end]

The volutine granules of Bacterium Diphteri are visualized by : [blank_start]Neisser[blank_end] staining

The following structures are localized in the cytoplasm:

Based on their cellular structure bacteria are divided into:

Peptides Glycan polymer are found only in :

Chemical structure of the capsule is composed of :

Sporulation appears to be :

The complete killing or removal of all microorganisms including bacteria spores is called :

What is the color of the simple method of Pfeiffer staining : [blank_start]red[blank_end]

Pfeiffer technical staining makes use of the following :

The cell wall of gram (+) bacteria is composed mainly :

Which of the following bacteria have peptidoglycan layer:

Cellular DNA is concentrated in (what place) :

The spores stain by Moller are :

Which structure is NOT protecting bacteria from phagocytosis from leukocytes:

Name two simple (basic) stains a/ [blank_start]Loeffler[blank_end] b/ [blank_start]Pfeiffer[blank_end]

The concentration of ethyl alcohol as an antiseptic for disinfection is :

Bacterial nucleoid consists of :

What is the name of staining procedure for bacterial capsule:

Lipopolysaccharide can be found in large amount :

Complex method for bacterial staining are :

Bacterial antibiotic resistance is frequently covered by :

What constitutes a bacterial culture : a/ [blank_start]Solute[blank_end] b/ dry [blank_start]agar[blank_end] c/ [blank_start]broth[blank_end]

Which one is a liquid medium for bacterial culture:

Anaerobes are bacteria that can tolerate high oxygen concentration

What bacterial physiologist studies :

70% ethanol is :

Which of the following is most important structure related to microbial attachment to cells :

Which statement about genetic transfer among bacteria requires cell to cell contact:

Which of the following related to endotoxin is not true:

What cause (hint) to be pink :

Gram (-) bacteria differ from Gram (+) ones because the posses :

The auto-sterilisation requires the following :

The chlorine is :

Concerning bacterial cell division everything is true except that :

How does high temperature cause cell death?

How are the actions of phenols and alcohols similar :

What is pasteurization :

Bacterial flagella are :

Name the complex nutrient media :

Extra chromosomal genetic elements in bacteria are :

What part of the bacterial cell is most involved with Gram staining and why? Ans: [blank_start]Cell wall[blank_end] Explanation: Gram [blank_start]positive[blank_end] bacteria have a [blank_start]thick[blank_end] peptidoglycan cell [blank_start]wall[blank_end] that holds the stain [blank_start]better[blank_end] than the [blank_start]thin[blank_end] peptidoglycan gram [blank_start]negative[blank_end] cell [blank_start]wall[blank_end]

What is the purpose of heat during the acid-fast staining procedure? The heat [blank_start]drives[blank_end] the stain [blank_start]into[blank_end] the cells

Name two curved bacteria: a. [blank_start]Vibrio Cholerae[blank_end] b. [blank_start]Helicobacteria[blank_end]

Name the reagent used and state the purpose of each of the following a/ mordant: Reagent- [blank_start]Iodine[blank_end] solution, Function: form a [blank_start]complex[blank_end] between the crystal violet and [blank_start]iodine[blank_end] b/ primary stain: Reagent- [blank_start]Gentian Violet[blank_end], Function: increases the [blank_start]contrast[blank_end] of both gram-negative and gram-positive bacteria c/ decolorizer: Reagent- [blank_start]Alcohol[blank_end], Function: [blank_start]dehydrates[blank_end] the peptidoglycan layer d/ counterstain: Reagent- [blank_start]carbol fuschin[blank_end], Function: stains solution light [blank_start]red[blank_end] allowing Gram [blank_start]negative[blank_end] to be seen

Round bacteria in chains are named [blank_start]streptococci[blank_end]

What suggestions about endotoxins are true? a/ they are typical for [blank_start]Gram (-)[blank_end] b/ they act [blank_start]non-specific[blank_end] c/ their chemical structure is [blank_start]lipopolysaccarides[blank_end] d/ they are heat [blank_start]stable[blank_end]