Which of the following is routinely used to detect spirochetes in skin lesions in early syphilis?
A. Phase-contrast microscopy
B. Dark-field microscopy
C. DNA fingerprinting
D. Bright-field microscopy
Answer: B
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Brittany and Jarod have been trying to have a second child for 10 years. They have one healthy child, but Brittany has had four early, spontaneous abortions. The most likely explanation for the many pregnancy losses is that Brittany and Jarod
A) are not having sex frequently enough. B) are each heterozygous for lethal alleles of the same gene. C) are each homozygous for lethal alleles of the same gene. D) have different alleles for all of their vital genes.
When the concentration of glucose in the blood rises following the digestion of a meal, what is the hormonal response?
A) Increased amounts of both glucagon and insulin are released. B) An increased amount of glucagon is released. C) An increased amount of insulin is released. D) Glucagon and insulin levels in the blood stay the same.
Describe how rolling circle replication can generate multimers of replicated DNA
What will be an ideal response?
What proteins are encoded by the retroviral pol gene? What is unique about the translation of this gene from the polycistronic RNA?
What will be an ideal response?