Adenylyl cyclase is to cAMP as ________ is to IP3.
A. Raf1
B. phospholipase C
C. calmodulin
D. protein kinase C
E. protein kinase A
Answer: B
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Mitochondria and chloroplasts have their own DNA but use the ribosomes of the host cell
Indicate whether the statement is true or false.
The differential distribution of wing length in Drosophila, with larger wings in northern areas and
smaller wings in southern climates, provides evidence that:a. chance is the most important agent in evolutionary change. b. natural selection is the most important agent in evolutionary change. c. wing length is not a heritable trait. d. the fossil record is usually inaccurate. e. the molecular clock cannot be applied to fruit fly traits.
Which of these is the most diverse group of plants?
a. gymnosperms b. ferns c. nontracheophytes d. angiosperms e. conifers
Based on a patient's medical history, a doctor suspects that the patient may have been exposed to syphilis several years prior. Since the patient is currently asymptomatic, the doctor will be testing to see if the patient is in the latent stage of syphilis. Which of the following would be the most effective way to diagnose syphilis during latency?
A. dark-field microscopy of scrapings from chancres B. dark-field microscopy of blood specimens C. culture of blood specimens on syphilis selective agar D. serological testing of blood specimens