The endotoxin of gram-negative bacteria is associated with
A. Mesosome
B. Cytoplasmic membrane
C. Capsule
D. Cell wall
Ans: D. Cell wall
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The byproduct of the metabolism of cyanobacteria that had the most effect on the further evolution of life is ____
a. oxygen gas b. carbon dioxide c. water d. nitrogen gas e. hydrogen gas
Semen does not contain
a) prostate fluid b) urine c) fructose d) prostaglandins e) both b and d are correct
Analysis of DNA sequences from two individuals of the same species results in a greater estimate of genetic variability than does analysis of amino acid sequences from the same individuals because...
A. different DNA sequences can code for the same amino acid B. Some amino acid variations cannot be detected b protein electrophoresis C. DNA sequencing is more reliable technique than protein electrophoresis D. proteins are more easily damaged than is DNA E. DNA is more heat-sensitive and therefore varies more
Pseudomonas species are occasional causes of
A. diarrheal disease. B. food poisoning from meat. C. food poisoning from dairy products. D. "flesh-eating" bacterial infections. E. urinary tract infections.