Transcript ch 43 clicker questions

CLICKER QUESTIONS
For CAMPBELL BIOLOGY, NINTH EDITION
Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Chapter 43
The Immune System
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Questions prepared by
Jung Choi
Georgia Institute of Technology
John Lepri
University of North Carolina, Greensboro
© 2011 Pearson Education, Inc.
Innate immunity is present
a) only in mammals.
b) only in vertebrates.
c) only in animals.
d) in eukaryotes but not in prokaryotes.
e) in all three domains of life, including eubacteria and
archaea.
© 2011 Pearson Education, Inc.
Recombinase genes RAG1 and RAG2 are
found only in jawed vertebrates, supporting the
hypothesis that
a) jawless vertebrates have immune memory.
b) jawless vertebrates employ combinatorial DNA
rearrangements to increase antigen receptor diversity.
c) sharks lack an adaptive immune system that
responds to diverse antigens.
d) human genomes do not recombine DNA segments in
antigen receptor genes.
© 2011 Pearson Education, Inc.
People need a flu shot each year because
a) the flu vaccine is only weakly immunogenic and
requires multiple shots to take effect.
b) the immune memory for flu is short-lived.
c) new strains of influenza virus arise rapidly each year.
d) influenza impairs the immune system’s ability.
© 2011 Pearson Education, Inc.
Even when _______ is implanted multiple
times into a vertebrate body, it would likely fail
to provoke production of antibodies.
a) a pathogenic virus
b) a nonpathogenic bacterium
c) a protein toxin
d) a plastic bead
e) a piece of plant leaf
© 2011 Pearson Education, Inc.
HIV-associated depletion of helper T cells and
macrophages will impair
a) the acid mantle of the skin.
b) the activation of cytotoxic T cells.
c) innate immunity.
d) the complement system.
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Ignoring heavy-chain DNA for the moment,
antigen-receptor light-chain DNA with 20 V
and 5 J segment genes can be recombined
into
a) 25 possible combinations
b) 100 possible combinations
c) 400,000 possible combinations
d) 1 million possible combinations
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To fight viral infections, it is most effective to
activate
a) B cells.
b) cytotoxic T cells.
c) macrophages.
d) the inflammatory response.
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To clone your pet cat when all you have is a
sample of its blood, you should use a
a) B cell as the nuclear donor.
b) T cell as the nuclear donor.
c) macrophage as the nuclear donor.
d) red blood cell as the nuclear donor.
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To genetically engineer pigs to become sources
of organs and tissue for transplantation to
humans, it will be necessary to replace pig
genes with the human version for
a) the MHC loci.
b) the immunoglobulin genes.
c) the T cell receptor genes.
d) all of the above.
e) all protein-coding genes.
© 2011 Pearson Education, Inc.