Micro Bio Test Ii

Front 1

The NAG and NAM building blocks are formed in the cytoplasm of the cell

Back 1

true

Front 2

In the membrane- associated phase of bacterial cell wall synthesis, specific enzymes link the NAG and NAM subunits wit the nucleic of the cell

Back 2

false

Front 3

Cell wall construction enzymes are potential targets for antibioics

Back 3

true

Front 4

The peptidoglycan layer of gram positive and gram negative bacteria consists of the sale peptidoglycan subunits

Back 4

false

Front 5

The last step in building the bacterial cell wall is the formation of the meshwork by binding together of the peptidoglycan layers within the inner layer of the bacterial call plasma memberan

Back 5

t/f

Front 6

mycobacterium tuberculosis

Back 6

mycolic acid

Front 7

gram positive bacteria

Back 7

teichoic acid

Front 8

clostridium bolulinum

Back 8

neurotoxin

Front 9

gram negative bacteria

Back 9

endotoxin

Front 10

streptococcus

Back 10

m protein

Front 11

which of the following statements is not true regarding requirements for bacterial growth?

Back 11

all bacterial have similar growth requirements of diagnosis and identification

Front 12

if the cell is place in a ______ solution, it loses water by a process referred to as _____

Back 12

hypertonic, plasmolysis

Front 13

a consequence of decreasing the pH below the optimum pH when culturing bacteria is _______

Back 13

there is an increase in hydroxyl ions, which disrupts hydrogen bonding

Front 14

a consequence of raising the temperature above the maximum growth temp when culturing bacteria is _____

Back 14

the destabilization of hydrogen bonds in protein

Front 15

the longer the generation time ____

Back 15

slower the number of bacteria increases within the host

Front 16

this type of media contains components of defined chemical composition that may prohibit the growth of certain organisms

Back 16

selective

Front 17

plant and meat extracts are commonly found in ___ media

Back 17

complex

Front 18

Which of the following statements is true regarding requirements for bacterial growth

Back 18

//

Front 19

a consequence of increasing the pH above the optimum pH when culturing bacteria is

Back 19

there is an increase in hydroxyl ions, which disrupts hydrogen bonding

Front 20

most human and animal pathogens are considered

Back 20

//

Front 21

superoxide dismutase

Back 21

converts free radical oxygen forms to molecular oxygen and peroxide

Front 22

if you want to ID a specific pathogen in a blood sample from a patient, you would use each of the following except

Back 22

each of the above is helpful in ID of bacteria in a blood sample

Front 23

during the stationary phase of the bacterial growth curve

Back 23

bacterial growth is equivalent to bacterial death

Front 24

thermophiles

Back 24

may grow in higher temp

Front 25

obligate anareobes

Back 25

grow slowly due to low production of ATP

Front 26

obligate acidophile

Back 26

cannot survive under high pH conditions

Front 27

facultative anaerobe

Back 27

able to grow all throughout the thioglycollate media

Front 28

obligate aerobe

Back 28

produce enzymes to decrease toxicity of free radical oxygen forms

Front 29

media probst the growth of certain organisms and can also differentiate between organisms is classified as

Back 29

selective and differential

Front 30

when DNA replication starts, DNA strands (A) called____ will unwind and pair with short RNA

Back 30

templates; primers

Front 31

the strand of DNA shown in B is the _____ and allows replications in the _____ directions

Back 31

leading 3' to 5'

Front 32

the enzyme _____ binds to the _____ end of the RNAs shown in E to add nucleotides to the growth DNA chain

Back 32

DNA polymerase, 3'

Front 33

the enzyme shown in D is called _____. it separates the DNA strands at the replication fork to initiate DNA replication

Back 33

helicase

Front 34

the strand of DNA shown in C is the _____. replication proceeds from ____ on this strand.

Back 34

lagging, right to left

Front 35

Nucelotides sequences on ______ dictate which amino acid should be added to the growing polypeptide chain during the process known as ______

Back 35

mRNA, translation

Front 36

each of the following is a feature of translation, except

Back 36

contains proofreading activity to check for errors

Front 37

single stranded structure

Back 37

RNA

Front 38

contains the nucleotide base cytosine

Back 38

both RNA and DNA

Front 39

Which of the following is a feature of translation

Back 39

it is driven by ribosomes, which are large, multi protein enzymes

Front 40

the enzyme _____ relaxes the supercoiled forms of DNA before the enzyme (shown in D), _____, separates the DNA strand at the replication fork to imitate DNA replication

Back 40

topoisomerase, helicase

Front 41

contains the base uracil

Back 41

RNA

Front 42

found in a supercoiled form

Back 42

DNA

Front 43

contains the sugar deoyribose

Back 43

DNA

Front 44

structure that is easily degraded by host enzymes

Back 44

RNA

Front 45

produced by the primes enzyme during DNA replication

Back 45

RNA

Front 46

an alteration in the position of genetic elements within a genome, possibly leading to genetic mutations is called

Back 46

transportation

Front 47

which of the following is not true of nucleotide excisions as a mechanism to repair DNA

Back 47

a DNA polymerase adds the correct bases to fill the gap

Front 48

each of the following is a feature of repression as a means to regulate gene expression, except

Back 48

it allows the activation of genes that are normally inactive in cells

Front 49

each of the following statements is true of generalization transducted except

Back 49

//

Front 50

conjunction of transduction are similar in the following manner:

Back 50

both processes involve genetic recombination

Front 51

each of the following statements id true of generalization transduction except

Back 51

//

Front 52

which of the following is a feature of induction as a means to regulate gene expression

Back 52

it allows the activation of genes that are normally inactive in cells

Front 53

conjugation and transformation are similar in the following manner:

Back 53

both processes involve genetic recombination

Front 54

which of the following is not true of a base excision as a mechanism to repair DNA

Back 54

//

Front 55

the diagram with the mice illustrates

Back 55

transformation

Front 56

in the diagram which is true regarding the S strand

Back 56

it has the capacity to undergo quorum sensing

Front 57

the process of the flame under the tube

Back 57

damaging and degrading bacteria A

Front 58

the death of the mouse compared to the first live mouse correlates with

Back 58

the ability of the R strain to acquire things from S strain

Front 59

which of the following is not true regarding the glycocalyx

Back 59

if loosely attached to the wall, it is called a capsule

Front 60

the following statement is not true regarding bacteria spores and sporogeneisis

Back 60

spores can be visualized under a microscope as pink rods using malachite green staining

Front 61

this structure is important in the motility of e.coli and allows it to cause opportunistic infections in the urinary tract

Back 61

flagella

Front 62

which of the following statements about fimbriae and/or pili is not true

Back 62

fimbriae achieve movement through extension and retraction

Front 63

which of the following about bacterial cell walls is not true

Back 63

the gram positive cell wall contains a thin layer of peptidoglycan as well as other components essential to maintaining the structure of the cell wall