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Mbio 3813
Name
Lecture Exam 2
26 March 2009 Last 4 of ID No.
INSTRUCTIONS:
Write Name and Last four digits of ID No. on pp. 1 and 2 of exam.
SCANTRON:
Last Name, space, First Name
in NAME BOX
and Last 4 digits of ID
in
IDENTIFICATION NUMBER BOX.
Fill
in the circles before time runs out.
No
extra time will be given!
All
books and notes must be closed. No electronic devices of any kind may be
used
Cell Phone Alert:
Ifyour cell phone is heard ringing during the exam, there is a mandatory 5 (’five) point penalti’. Ifyou
expect a very important call, identify yourself to the instructor for special arrangements.
Academic Misconduct. Submission of the exam indicates tacit agreement with the statement "I have neither given nor
received inappropriate aid in completing this exam." Using crib sheets, electronic communication, looking at another
person’s paper, or any other activities which compromise the integrity of the exam are unacceptable and will be dealt with.
A. ESSAY QUESTION (20pIs):
Choose one topic from the following list. Write the Roman Numeral in the small box on p. 1.
Write your answer to the topic in the large box. No material outside the big box will be considered or graded Please write
legibly!
Criteria for essay: 15 points for accuracy and thoroughness of answer. A
list, table, or drawing without explanatory text
cannot earn full credit.
Lecture, textbook and other appropriate information ought to be integrated 5 points for grammar,
clarity of writing, spelling of technical terms, and other considerations.
Topic I. Compare and contrast different approaches and methods that humans use for controlling the growth and
survival of microorganisms. A thorough response will provide indications of how growth and survival are
quantified.
Topic II. In the book
Arrowsmith,
Sinclair Lewis describes the attempts of Dr. Arrowsmith and others to control
bacterial infections in humans. Interestingly, one type of control agent he utilized acted in some ways as an arrow
directed against the infections. What were the pathogens? What was that "arrow"? What effect did it have upon
the pathogens? Choose one type of "arrow", lytic or lysogenic, and make a recommendation to the reader why
that type, and not the other type, would be most appropriate for controlling infection.
A thorough answer will include some appropriate reference to the Lewis book
and
also refer to a current research
front in infectious disease control that is closely related to this subject in the book.
B. MULTIPLE CHOICE QUESTIONS.
Choose the letter of the
best
response and darken the corresponding
circle on your Scantron Sheet (Use Number 2 Pencil!) No extra time will be given to fill in the circles. You may
write on these pages, but only the responses on the Scantron Sheet will be graded.
1.
A microorganism which grows in a functioning refrigerator would be a(n):
A. thermophile
B. mesophilepsychrophile D. hyperthermophile
E. endospore
2.
In which growth phase(s) does cell number stay approximately the same over time?,,,.
A. Lag
B. Exponential
C. Stationary
D. Death
;’iE. two of the above
Which of the following forms of oxygen is generally toxic to living organisms?
A Superoxide ion
B Hydrogen Peroxide
C Hydroxyl Radical
t
D All of the above
4. A strict anaerobe:
A. absolutely requires molecular oxygen for growth
B. is killed by molecular oxygen
C. is not affected by molecular oxygen either for growth 6isurvival
D. requires molecular oxygen at very low concentrations for the cell to be able to grow
M3813 Exam 2
