MCB 100 UIUC Study Questions and Complete Solutions
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Course
MCB 100
Institution
MCB 100
Which of the following is a sign of disease? A. headache B. dizziness C. fever D.nausea E. cramps C. fever
Which of the following is a symptom of disease? A.fever B.swelling C.diarrhea D.dizziness E. rash D. Dizziness
What steps should a researcher take to establish a cause-and-effect relationshi...
MCB 100 UIUC Study Questions and
Complete Solutions
Which of the following is a sign of disease?
A. headache
B. dizziness
C. fever
D.nausea
E. cramps ✅C. fever
Which of the following is a symptom of disease?
A.fever
B.swelling
C.diarrhea
D.dizziness
E. rash ✅D. Dizziness
What steps should a researcher take to establish a cause-and-effect
relationship between a pathogen and a lethal illness?
A. Identify the causative pathogen.
B. Obtain the pathogen from the disease outbreak patients.
C. Infect uninfected people and check for similar symptoms.
D.A, B and C
E. A and B only ✅E. A & B only
Which of the following would make it not possible to satisfy all of
Koch's postulates for a particular microorganism?
A. The microorganism only infects nonhuman animals.
B. The microorganism causes serious symptoms in humans.
C. The microorganism cannot be isolated in pure culture.
D.The identity of the microorganism is in question.
E. Genes from the microorganism cannot be amplified by PCR. ✅C. The
microorganism cannot be isolated in pure culture.
You suspect that a newly discovered bacterial secretion system identified in
an E. coli strain isolated from a recent outbreak is important for secreting a
particular protein toxin that is important for virulence. How would you most
directly test this hypothesis?
A.Make a mutation in the secretion system and see if the bacterium is
still virulent.
B. Make a mutation in the secretion system and see if the toxin still
gets secreted.
C. Make a mutation in the toxin gene and see if the bacterium is still
, virulent.
D.A, B and C
E. B and C ✅B. Make a mutation in the secretion system and see if the toxin still
gets secreted.
Which eukaryotic organelle has catabolic enzymes that degrade old, damaged, and
diseased cells?
-Peroxisomes
-Mitochondria
-Golgi body
-Lysosomes ✅Lysosomes
What does it typically mean when a pathogen is transmitted via the parenteral route?
-That a disease is transmitted from mother to fetus
-That a disease is sexually transmitted
-That the integrity of the skin or a mucous membrane is circumvented or bypassed,
allowing a microbe to enter
-That a disease-causing microbe invades orally ✅That the integrity of the skin or a
mucous membrane is circumvented or bypassed, allowing a microbe to enter.
Which cellular structure can help bacteria avoid destruction by phagocytic cells?
-Flagella
-A cytoplasmic membrane
-A glycocalyx
-A cell wall ✅A glycocalyx
What is an example of species resistance?
A. A virus that can infect both animals and humans.
B. A virus that causes disease in plants cannot cause disease in humans.
C. A virus cannot cause disease in a particular human because that human lacks a
specific receptor to which the virus's attachment molecules binds.
D. A virus that can only infect humans because its attachment molecules bind to the
human cell surface receptor. ✅B. A virus that causes disease in plants cannot cause
disease in humans.
How does lysozyme on the skin and in tears protect against bacterial pathogens?
A. Lysozyme increases the amount of salt on the skin and therefore inhibits bacteria
that are unable to withstand high salt concentrations.
B. Lysozyme is a broad-spectrum antimicrobial that is active against Gram-positive
bacteria, Gram-negative bacteria, and fungi.Press enter after select an option to check
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