Download Quiz #7 - San Diego Mesa College

SAN DIEGO MESA COLLEGE
SCHOOL OF NATURAL SCIENCES
General Microbiology (Bio 205): Instructor: Elmar Schmid, Ph.D.
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Answer the following questions and mark it on a Scantron 882-E answer sheet. All
questions must be answered by the student without help by class mates, friends or other
human beings. You are of course allowed (and I encourage you) to work with your
textbook (and if necessary the selected chapters of my website) to find the correct
answers.
Make sure that you read the following statement below very carefully and sign it if you
satisfy the guidelines outlined in this statement. This signed take home exercise sheet (=
page 1 of this document) must be turned in together with your completed Scantron card in
order to receive full credit for this assignment.
The deadline for this assignment is announced in the “Microbiology” section of my website.
I HAVE ANSWERED THE QUESTIONS IN THIS EXERCISE ON MY OWN. I DID NOT CONSULT OTHERS
OR IN ANY CONDUCT IN ANY ACTIVITITES THAT COULD BE CONSTRUED AS CHEATING IN THIS
ASSIGNMENT. I DID NOT MAKE ANY COPIES OF THIS ASSIGNMENT.
_________________________________
(PRINT YOUR NAME)
________________________________
(YOUR SIGNATURE)
Q. 1: The alpha-proteobacterium which produces characteristic flagellated swarmer cells by
asymmetric transverse binary fission is called
A) Proteus vulgaris
B) Cytophaga
C) Caulobacter
D) Helicobacter
E) Rhodopseudomonas
Q. 2: Which of the following is/are (a) typical alpha-proteobacteria characteristic(s)?
A) they are gram-negative
B) they are mostly aerobic
C) can be rods or cocci
D) some produce highly motile swarmer cells
E) all of the above
Q. 3: Which of the following is NOT true about the alpha-proteobacterium Rhizobium?
A) it is a rod-shaped gram-negative bacterium
B) it triggers the formation of nodules in the roots of legume plants
C) it is a symbiotic bacterium found in animal guts
D) it is able to perform nitrogen fixation
E) it plays an important ecological role as “natural soil fertilizer”
Q. 4: What is the name of the enzyme with which help Rhizobia bacteria are able to generate
ammonia from atmospheric N2?
A) hydrogenase
B) nitrogenase
C) nitrate reductase
D) ammonium lyase
E) transaminase
Q. 5: Whooping cough is caused by the capsulated bacterium Klebsiella pneumoniae.
A) True
B) False
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SAN DIEGO MESA COLLEGE
SCHOOL OF NATURAL SCIENCES
General Microbiology (Bio 205): Instructor: Elmar Schmid, Ph.D.
Q. 6: Which of the following is/are TRUE of members of the genus Pseudomonas?
A) they are strictly anaerobic soil bacteria
B) they are able to decompose a wide variety of organic compounds.
C) they can become serious obligate intracellular parasites.
D) they are known to form cysts when starved for nutrients.
E) both, a and b are true
Q. 7: A male patient seeks medical treatment after discovering urethral discharge of yellow,
creamy pus and having a burning sensation during urination. The examining hospital staff
discovers a gram-negative, non-motile and aerobic bacterium which capsulated cells show
diplococci formation under the microscope. They conclude that the patient suffers from
______________ due to an infection with _________________.
A) Syphilis … Treponema pallidum
B) Syphilis … Neisseria gonorrhea
C) Gonorrhea ..Neisseria gonorrhea
D) Gonorrhea … Burkholderia
E) Lyme disease … Borrelia burgdorfferi
Q. 8: The plant pathogen and alpha-proteobacterium which causes crown galls in infected plants
with the help of a tumor-inducing Ti plasmid is called
A) Bacillus thuringiensis
B) Agrobacterium tumefaciens
C) Erwinia carotovora
D) Rhizobium leguminosarum
E) Pseudomonas fluorescens
Q. 9: The bacterium which is a good indicator of human fecal contamination of water supplies
because it is an intestinal bacterium that is relatively viable in water and easy to detect is
A) Bacillus subtilis
B) Pseudomonas sp.
C) Vibrio cholerae
D) Escherichia coli
E) Enterobacter cloacae
Q. 10: Which of the following is responsible for food spoilage even in sealed off and canned foods?
A) Clostridium perfringens
B) Clostridium botulinum
C) Clostridium thermocellum
D) Clostridium acetobutylicum
E) Clostridium tetani
Q. 11: Which of the following is/are NOT true of the clostridia?
A) they are aerobic, non-sporulating rods
B) they are strictly anaerobic, mostly sporulating rods
C) they are gram negative bacteria
D) they ferment glucose in ethanol, acetate and other organic acids
E) both, a and c are not true
Q. 12: Which of the following is NOT normally considered a pathogenic species of Clostridium?
A) C. acetobutylicum
B) C. botulinum
C) C. perfringens
D) C. tetani
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SAN DIEGO MESA COLLEGE
SCHOOL OF NATURAL SCIENCES
General Microbiology (Bio 205): Instructor: Elmar Schmid, Ph.D.
Q. 13: Which of the following low G+C bacteria causes the human disease gas gangrene?
A) Streptococcus pneumoniae
B) Clostridium tetani
C) S. feacalis
D) Clostridium perfringens
E) Lactococcus lactis
Q. 14: Which of the following is/are TRUE of the genus Salmonella?
A) they belong to the class gamma-Proteobacteria
B) they are gram negative bacteria
C) they are non-sporulating rods
D) many produce medically relevant antibiotics, such as bacitracin, polymyxin B
E) all of the above, except d
Q. 15: Which of the following is/are TRUE of the genus Bacillus?
A) they are mostly aerobic non-sporulating rods
B) they are mostly aerobic, sporulating rods
C) they are gram positive bacteria
D) includes the species and human pathogen B. anthracis
E) all of the above, except a
Q. 16: What is the name of the insect pathogenic bacterium which produces the pesticidal Bt
protein within its parasporal body?
A) Bacillus anthracis
B) Streptococcus mutans
C) Rhizobium leguminosarum
D) Paenibacillus
E) Bacillus thuringiensis
Q. 17: Which of the following insect groups is/are negatively affected by the Bt toxin?
A) butterflies
B) moths
C) cockroaches
D) beetles
E) all of the above, except c
Q. 18: The largest group of proteobacteria are the
A) alpha proteobacteria.
B) beta proteobacteria.
C) gamma proteobacteria.
D) delta proteobacteria.
Q. 19: Which of the following is/are NOT (a) capsulated bacterium belonging to the family
Enterobacteriacaea?
A) Klebsiella
B) Citrobacter
C) Shewanella
D) Shigella
E) both, b and c
Q. 20: Helicobacter pylori is a human pathogen responsible for peptic dysentery.
A) True
B) False
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