Restriction fragment length polymorphisms (RFLPs) are used to ____
a. test the effectiveness of different restriction enzymes on a sequence of DNA
b. compare the DNA sequences between individuals by looking for changes in restriction enzyme digest patterns
c. compare the full DNA sequences of two individuals
d. prepare DNA for further sequence analysis
e. treat sickle-cell anemia
ANSWER: b
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How does inefficient transfer of energy among trophic levels result in the typically high endangerment status of many top-level predators?
A) Top-level predators are destined to have small populations that are sparsely distributed. B) Predators have relatively large population sizes. C) Predators are more disease-prone than animals at lower trophic levels. D) Predators have short life spans and short reproductive periods. E) Top-level predators are more likely to be stricken with parasites.
The expression of thousands of genes simultaneously is easily accomplished using which of the following techniques?
A) siRNAs B) Northern blotting C) microarrays D) Eastern blotting E) PAGE analysis
Cocklebur will not flower if exposed to 8 hours of dark and 16 hours of light. It will flower if exposed to 16 hours of dark and 8 hours of light. However, if the 16 hours of dark is interrupted with a brief period of light, the cocklebur will not flower. Which of the following will trigger cocklebur to flower?
A. short dark periods B. short light periods C. long dark periods D. None of the answer choices is correct. E. long light periods
Place the following components of the nervous system anatomy in order from skull to brain.
A. Dura mater, arachnoid mater, subarachnoid space, pia mater B. Arachnoid mater, subarachnoid space, dura mater, pia mater C. Subarachnoid space, arachnoid mater, dura mater, pia mater D. Dura mater, arachnoid mater, pia mater, subarachnoid space E. Pia mater, arachnoid mater, subarachnoid space, dura mater