In the lagging stand, the DNA is read from the parental DNA's 3' to 5' end.
a. true
b. false
Answer: a. true
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What is the significance of the production of above-ground coralloid roots by cycads that have underground stems?
A. The roots grow in waterlogged soil and they need to protrude into the air in order to respire. B. The branching of coralloid roots provides greater surface area for absorption of water. C. It keeps roots above the ground where they cannot be attacked by parasitic nematodes. D. The roots have mutualistic photosynthetic cyanobacteria that fix nitrogen for the cycad and the cyanobacteria can only survive if they are above ground where they are exposed to light. E. The soil in which cycads live has a low pH that would kill the roots if they were completely below ground.
Agarose gel electrophoresis separates nucleic acid fragments according to
A. density. B. shape. C. size. D. sequence.
Of the following countries, which of them
control and have natural resources rights to the Arctic?
a. Russia d. none of these b. Canada e. all of these c. United States
The target tissue for erythropoietin is ____
a. brain b. kidney c. liver d. bone marrow e. lungs