When does translation begin?

a. when a tRNA anticodon recognizes an mRNA codon
b. when a polypeptide chain is formed
c. when a ribosome accepts charged tRNAs
d. when an uncharged tRNA departs the complex


a. when a tRNA anticodon recognizes an mRNA codon

Biology & Microbiology

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Trench fever, bacteremia, endocarditis, chronic lymphadenopathy, and bacillary angiomatosis can be caused by:

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Genetic monogamy is ____

a. predominant in mammals b. common in all animals c. rare d. less common than social monogamy e. beneficial to evolutionary fitness

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A typical human body cell contains how many sex chromosomes?

A) 2 B) 46 C) 1 D) 23

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Dilation of blood vessels in extremities can help animals lose excess heat as part of thermoregulation.

a. true b. false

Biology & Microbiology