If a DNA sample were composed of 10% thymine, what would be the percentage of guanine?
A) 10
B) 40
C) 80
D) It is impossible to tell from the information given.
B
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Compared to the first big syphilis epidemic several hundred years ago in Europe, the strains of Treponema pallidum that cause syphilis today
A. tend to be more virulent. B. tend to be less virulent. C. are about equally virulent. D. cannot be compared.
Males have little influence on population growth in populations with ____
a. more males than females b. more females than males c. equal numbers of females and males d. one male e. animals that form lifelong pairs
What role does clathrin play in receptor-mediated endocytosis?
a. Clathrin is the receptor where the highly specific binding takes place. b. Clathrin initiates the transcription of the receptor proteins that will coat the pit. c. Clathrin attaches to the plasma membrane’s cytoplasmic side, forming the coated pit. d. Clathrin production blocks the formation of the coated pit.
The phosphorus cycle is unique from nitrogen and carbon in that it
A) forms the most layers of sediment. B) is found only in aquatic environments. C) is restricted to ocean habitats. D) can be found anywhere. E) never enters the atmosphere.