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Microbiology:BIsc 260 > Important: Exam 2 > Flashcards

Important: Exam 2 Flashcards

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Biology 101 flashcards
1
Q

True or false: HPV encodes two oncogenes L1, L2

A

false

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2
Q

true or false: HPV knocks out p53 and pRb

A

true

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3
Q

true or false: HPV 16,18 are HIGH risk causing cancer

A

true

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4
Q

true or false: Deinococcus radiodurans is a extremeophilic bacterium able to survive extremely high temperatures

A

true

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5
Q

true or false: Deinococcus radiodurans was discovered when packaging cans irradiated with gamma-rays and the canned meat spoiled

A

true

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6
Q

true or false: Deinococcus radiodurans GC content is at 67% and is similar to thermotolernt species

A

true

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7
Q

movement toward a chemical attractant or away from a chemical repellent

A

chemotaxis

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8
Q

in presence of attractant/repellent tumbling frequency is __; runs toward/away from compound are __

A

reduced, longer

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9
Q

behavior of bacterium altered by temporal concentration of __

A

chemicals

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10
Q

the __ is a group of proteins needed for DNA synthesis that assembles at the origin of replication

A

replisomes

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11
Q

proteins are synthesized on structures called

A

ribosomes

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12
Q

the major site of cell membrane synthesis is the

A

endoplasmic reiculum

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13
Q

the plasma membrane of eukaryotes contain all of the following except A. phosphoglycerides B. sphingolipids C. sterols D. peptidoglycan

A

peptidoglycan

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14
Q

which of the following is a function: A. tricarboxylic acid enzyme reactions B. electron transport C. ATP synthesis D. all of the above

A

all of the above

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15
Q

membrane delimited intracellular structures that perform specific functions in cells are called

A

organelles

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16
Q

the organelle responsible for harvesting light as an energy source for photosynthesis is the

A

chloroplasts

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17
Q

T/F: Flagellar synthesis is a complex process involving many gene/genes products

A

true

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18
Q

what does the new flagellin molecules get transport through for flagella synthesis

A

a hollow filament

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19
Q

why do flagella disrupt run causing the cell to stop and tumble?

A

because it senses molecules so it goes to them

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20
Q

changing concentration of chemical attractants and chemical repellents bind __ of chemosensory system

A

chemoreceptors

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21
Q

in presence of attracts/ repellent, tumbling frequency is __ ; runs forward/away compound are ___

A

reduced, longer

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22
Q

behavior of bacterium altered by what?

A

temporal concentration of chemical

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23
Q

temp range for psychrophiles

A

0 to 20 degrees Celsius

24
Q

temp range for psychotrophs

A

0 to 35 degrees celsius

25
Q

temp range for mesophiles

A

20 to 45 degrees celsius

26
Q

temp range for thermophiles

A

55 to 85 degrees celsius

27
Q

temp range for hyperthermophiles

A

85 to 113 degrees celsius

28
Q

growth in prescence of different oxygen concentrations depends on:

A

metabolize processes, electron transport chains (ETC), terminal electron acceptor used

29
Q

strict anaerobic microbes lack/have very low quantities of:

A

superoxide dismutase, catalase

30
Q

attack only a few different pathogens

A

narrow spectrum drugs

31
Q

attack many different pathogens

A

broad -spectrum drugs

32
Q

kills microbes

A

cidal agent

33
Q

inhibits growth of microbes

A

static agent

34
Q

penicillin prevents the synthesis of complete __ __ leading to lysis of cell

A

cell wall

35
Q

Penicillin acts only on growing bacteria that are synthesizing new __

A

peptidoglycan

36
Q

structurally and functionally similar to penicillins

A

cephalosporins

37
Q

broad-spectrum antibiotics that can be used by most patients that are allergic to penicillin

A

cephalosporins

38
Q

vancomycin and teicoplanin are both what kind of antibiotics?

A

glycopeptide

39
Q

vancomycom amd teicoplanin inhibits or does not inhibit cell wall synthesis?

A

inhibits

40
Q

important for treatment of antibiotic resistant staphylococcal and enterococcal infections

A

vancomycin

41
Q

previously considered “ drug of last resort” so rise in resistance to this drug is of great concern

A

vancomycin

42
Q

many antibiotics bind specifically to the bacterial __

A

ribosome

43
Q

large group, all with a cyclohexane ring, amino sugars

A

aminogylcoside antibiotics

44
Q

aminogylcoside antibiotics bind t 30S ribosomal subunit, interfere with protein synthesis by directly doing what ? and by causing misreading of what?

A

directly inhibiting the process and messenger RNA (mRNA)

45
Q

grow optimally in the presence of NaCL or other salts at a concentration above about 0.2M

A

halophiles

46
Q

requires salt concentration of 2M and 6.2 M. also extremely concentrations of potassium

A

extreme halohpiles

47
Q

for extreme halophiles, what require high salt to maintain stability and activity

A

cell wall, proteins, and plasma membrane

48
Q

usually killed in presence of )2

A

obligate anaerobe

49
Q

requires 2-10% O2

A

microaerophile

50
Q

grow with or without O2

A

aerotolerant anerobes

51
Q

strict anerobic microbes lack/have very lo quantities of:

A

superoxide dismutase and catalase

52
Q

these attached microbes are members of complex, slime enclosed communities called

A

biofilm

53
Q

is an autoinducer molecule produced by many gram0negative organisms

A

acylhomoserine lactone

54
Q

favor the growth of some microorganisms and inhibit growth of others

A

selective media

55
Q

distinguish between different groups of microorganisms based on their biological characteristics

A

differential media

56
Q

closed system population growth eventually stops, total number of viable cells remains constant

A

stationary phase

57
Q

direct cellcan measure changes in number of cells in a population and change in mass of population

A

measurement of microbial growth

Microbiology:BIsc 260 (18 decks)

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