1. Radiolarian protists often synthesize extensive proteinaceous scales that are
ID: 13124 • Letter: 1
Question
1. Radiolarian protists often synthesize extensive proteinaceous scales that areexternal to the cell membrane. These proteins are synthesized and exported via
________________. By contrast, the bacterium Caulobacter, which synthesizes
and exports many proteins used in forming its S-layer must utilize
______________ for export of these proteins.
a. The endomembrane system (rough ER ? Golgi ? vesicle), the Sec-
Dependent Pathway
b. The Sec-Dependent Pathway, The endomembrane system (rough ER ?
Golgi ? vesicle)
c. Group Translocation, ABC transporters
d. ABC transporters, Group Translocation
2. Both humans and the bacterium Pseudomonas aeruginosa have an electron
transport chain. In fact, both organisms utilize aerobic respiration. With these
similarities in mind, how do the two organisms differ?
a. Whereas ATP can be synthesized using the PMF in human cells, this
cannot occur in P. aeruginosa cells.
b. Whereas the components of the ETC of P. aeruginosa span the
cytoplasmic membrane, human ETC components span the inner
membranes of mitochondria.
c. Whereas P. aeruginosa cells can form a proton motif force, humans
cannot.
d. Whereas P. aeruginosa uses O2 as a terminal electron acceptor in its ETC,
humans do not.
3. A single cell of the bacterium Bacillus subtilis falls on an isolated location on a
TSA plate. As the cell reproduces via binary fission, all of the following take
place EXCEPT
a. The chromosome replicates.
b. Any plasmids in the cell replicate.
c. The cell elongates, increases in volume and two separate daughter cells
form.
d. The mother cell forms a bud, which matures to form a daughter cell. The
mother cell continues to do this until it dies.
4.Which statements are TRUE? [*This is a multiple answer question, please select
all that apply.]
a. The growth phase labeled D is the Lag phase.
b. Cells capable of synthesizing antibiotics and other secondary metabolites
would do so in the phase labeled C.
c. It is during the death phase that bacteria are the most susceptible to
antibiotics.
d. The growth phase labeled A is the lag phase and would be longer if a
colony were taken from a warm, shaking TSB tube and placed onto a cold
GSA plate than if a colony were taken from a warm TSA plate and placed
into warm TSB broth.
e. The growth phase labeled B is the phase of prolonged decline.
Explanation / Answer
1. Radiolarian protists often synthesize extensive proteinaceous scales that areexternal to the cell membrane. These proteins are synthesized and exported via
endomembrane system. By contrast, the bacterium Caulobacter, which synthesizes
and exports many proteins used in forming its S-layer must utilize
secondary dependent pathway for export of these proteins.
a. The endomembrane system (rough ER ,Golgi vesicle), the Sec-
Dependent Pathway
b. The Sec-Dependent Pathway, The endomembrane system (rough ER ?
Golgi ? vesicle)
c. Group Translocation, ABC transporters
d. ABC transporters, Group Translocation
2. Both humans and the bacterium Pseudomonas aeruginosa have an electron
transport chain. In fact, both organisms utilize aerobic respiration. With these
similarities in mind, how do the two organisms differ?
a. Whereas ATP can be synthesized using the PMF in human cells, this
cannot occur in P. aeruginosa cells.
b. Whereas the components of the ETC of P. aeruginosa span the
cytoplasmic membrane, human ETC components span the inner
membranes of mitochondria.
c. Whereas P. aeruginosa cells can form a proton motif force, humans
cannot.
d. Whereas P. aeruginosa uses O2 as a terminal electron acceptor in its ETC,
humans do not.
3. A single cell of the bacterium Bacillus subtilis falls on an isolated location on a
TSA plate. As the cell reproduces via binary fission, all of the following take
place EXCEPT
a. The chromosome replicates.
b. Any plasmids in the cell replicate.
c. The cell elongates, increases in volume and two separate daughter cells
form.
d. The mother cell forms a bud, which matures to form a daughter cell. The
mother cell continues to do this until it dies.
For 4th question please provide the remaining half of the multiple choice, so that i can help you. Thank you!!!!
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