If a T cell that has received signal 1 for activation fails to also receive signal 2 it may become ________.
A. apoptotic
B. anuclear
C. cancerous
D. anergic
Answer: D
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Instead of being isolated by pure culture, SAR11 was discovered when researchers analyzed the gene sequences contained within seawater samples
A. true B. alse
The changes that occur in virally infected cells are characteristic for a particular virus and are referred to as the
A. cytopathic effect. B. phenotypic effect. C. genotypic expression. D. cytology.
A genomic library consists of fragments of all of the DNA:a
that occurs in one species. b. contained in one chromosome. c. that would be found in a typical cell of a particular organism. d. in a recombinant gene. e. that codes for functional enzymes in a typical cell of a particular organism.
How does pH negatively affect the metabolism of microorganisms?
pH changes can denature enzymes pH changes can disrupt cell wall structure pH changes alter the availability of water