Which of the following is true of chemokines?
A) They ensure production of enough leukocytes.
B) They are involved in B lymphocyte activation and differentiation.
C) They are chemotactic factors for leukocytes.
D) They cause basophils and eosinophils to degranulate.
E) They are substances used to signal between leukocytes.
C
Bloom's Taxonomy: Knowledge
Section: Elements of Adaptive Immunity
Learning Outcome: 16.20
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A certain species of pine tree survives only in scattered locations at elevations above 2800 meters in the western United States. To understand why this tree grows only in these specific places, an ecologist should _____
A) conclude that lower elevations are limiting to the survival of this species B) study the anatomy and physiology of this species C) investigate the various biotic and abiotic factors that are unique to high altitude D) analyze the soils found in the vicinity of these trees, looking for unique chemicals that may support their growth E) collect data on temperature, wind, and precipitation at several of these locations for a year
Discuss how the Human Microbiome Project will impact our understanding of human disease. What will be an ideal response?
You have isolated two novel compounds, Compound X and Compound Y, which you suspect might be carcinogenic in some way. Based on their chemical characteristics, you hypothesize that Compound X is a cancer initiator and Compound Y is a cancer promoter
Design an experiment to test your hypothesis. What will be an ideal response?
A trinucleotide repeat refers to:
A) a nucleotide that is made of three subunits: a sugar, a phosphate, and a nitrogenous base. B) the same nucleotide repeating three times in a row. C) a nucleotide that contains three bases. D) a sequence of three nucleotides that repeats and can be involved in genetic diseases.