_______ live within and provide energy for the reef-building coral animals, whose efforts support diverse and beautiful coral reef communities.

Fill in the blank(s) with the appropriate word(s).


Ans: Dinoflagellates

Biology & Microbiology

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Which of the following is not true of the second step of translational elongation in bacteria?

A. The carboxyl group oxygen of the A-site amino acid is the nucleophile in peptide bond formation. B. A peptide bond is formed between the two amino acids bound by the tRNAs in the A and Psites. C. The growing polypeptide chain is transferred to the tRNA in the A site. D. The ?-amino group of the A-site amino acid attacks the carbonyl carbon of the P-site amino acid.

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Ribozymes may have originally developed by ____

a. ATP synthesis b. the chance assembly of RNA molecules c. cellular respiration d. glycolysis e. electron transfer systems

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Pheromones are a type of ________ signal

a. mechanical b. chemical c. tactile d. auditory e. physical

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When a person is tested for HIV, the test is considered positive if _______ to the HIV are present.  

A.  bacteria B.  antigens C.  antibodies D.  T-cells E.  natural killer cells

Biology & Microbiology