What are the properties of DNA probes?

I. They are labeled with a radioactive
tracer.
II. They are short chains of nucleotides.
III. They match the targeted DNA sequence.



a. I and II
b. II and III
c. I only
d. I, II, and III
e. III only


D

Biology & Microbiology

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True-breeding, purple-flowered pea plants were crossed with true-breeding, white-flowered pea plants. The F1 progeny all had purple flowers. If the F1 offspring are self-fertilized, what progeny phenotypes would be expected?

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Which type of epithelial cells act in absorption and secretion?

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In non-cyclic photophosphorylation, where do electrons go after being released from photosystem II?

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Which of the following is a gymnosperm?

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