Cyanobacteria produce which of the following?
A) hydrogen sulfide gas
B) large quantities of ammonia
C) oxygen
D) sulfuric acid
Ans: C) oxygen
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Spoilage of bread, which appears dark green-blue to black in color, is MOST likely caused by the fungus
A) Aspergillus niger. B) Batrachochytrium dendrobatidis C) Glomus spp. D) Rhizopus stolonifer.
The PAMP recognized by mannose-binding lectin (MBL) is the sugar mannose, found as a repeating subunit in
A) human mucus. B) lymphocyte receptors. C) bacterial and fungal polysaccharides. D) bacterial peptidoglycan.
Which of the following is not part of the P1 lytic cycle?
A. The DNAs are cut from the linear product of rolling circle replication, circularized, and then packaged into phage heads. B. When P1 DNA enters the cell, it circularizes its genomes using the Cre-lox recombination system. C. Rolling circle replication occurs, generating many copies of the phage genome as a long linear DNA. D. The cells lyse and the mature phages can infect other cells. E. All of the choices given are part of the lytic cycle.
Which of the following is NOT associated with bacteria in the genus Streptomyces?
A) the "musty" smell of soil B) nutrient recycling in soil C) antibiotic production D) microbial antagonism E) protection of plants against caterpillars