Who are responsible for discovering the structure of DNA?
A. Francis Crick and James Watson
B. Matthias Schleiden and Theodor Schwann
C. Charles Darwin and Joseph Farman
D. Anton van Leeuwenhoek and Theodor Schwann
E. Theodor Schwann and Robert Hooke
Answer: A
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What is required for the transposition of a retroelement? Select all that apply.
_____ DNA polymerase _____ RNA polymerase _____ Reverse transcriptase _____ Integrase
The hanging drop preparation is useful when observing biochemical reactions
a. true b. false
Which blood vessels carry oxygenated blood?
A. Pulmonary veins B. Pulmonary arteries C. Systemic veins (such as the femoral vein in your leg)
The filtration step in the formation of urine for animals sorts materials only by
A. whether they are charged or not. B. overall size with cells and proteins usually being kept out of the filtrate. C. whether the substance in question is a waste product or not. D. whether they contain nitrogen or not. E. the hydration state of the body.