How many possible codons (of normal size) are possible using the bases found in DNA?

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#Question id: 3915

#Unit 3. Fundamental Processes

Which of the following is true for the unwinding of the DNA helix and the synthesis of a short stretch of RNA?

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#Question id: 31184

#Unit 4. Cell Communication and Cell Signaling

Which of the following are the central player in the canonical Wnt intracellular signal transduction pathway in vertebrates and in Drosophila respectively? 

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#Question id: 12145

#Unit 10. Ecological Principles

If population size is exactly half of carrying capacity: 

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#Question id: 11169

#Unit 10. Ecological Principles

The viceroy butterfly (limenitis archippus) resembles the queen butterfly (danaus gilippus), a species toxic to birds because of alkaloids it stores during larval development from the milkweeds it feeds upon. The viceroy butterfly is an example of what kind of defense against predation?

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#Question id: 826

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one is incorrect about the proteins with segments rich in Pro (P), Glu (E), Ser (S), and Thr (T), the so-called PEST proteins,