Researchers Feng and Zhao discovered premature stop codons in the T1R gene in Toothed and Baleen whales. How would a premature stop codon affect this protein?

A. The protein will be partially synthesized and will function incorrectly.

B. The protein would be synthesized completely intact and function properly.

C. The protein would be synthesized completely intact but function incorrectly.

D. The protein will be partially synthesized and function correctly.

E. The gene for the protein would no longer be found in the genome.


A. The protein will be partially synthesized and will function incorrectly.

Biology & Microbiology

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Groups of related, but distinctly different genes that appear to have arisen from a single ancestral gene are referred to as  

A.  segmental duplications. B.  pseudogenes. C.  tandem clusters. D.  multigene families. E.  expressed sequences.

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Hyphae are tubular cell walls that surround the cytoplasmic membrane

Indicate whether the statement is true or false.

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The Lake Erie ecosystem was affected by humans because human activities ____

a. extracted resources without replacement b. caused global warming c. used the water without replacement d. disrupted energy flow and the cycling of nutrients e. extracted energy without replacement

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The gastrovascular cavity of a flatworm serves as both the ____ and ____ systems of the body

a. digestive; circulatory b. digestive; reproductive c. digestive; respiratory d. circulatory; respiratory e. respiratory; reproductive

Biology & Microbiology