A cladist would attempt to classify organisms into ____ taxa
a. derived
b. polyphyletic
c. paraphyletic
d. phenotypic
e. monophyletic
e
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The pentose phosphate pathway produces
A. glyceraldehyde 3-phosphate. B. NADPH. C. CO2. D. All of the choices are correct.
Which of the following is not a tenet of the cell theory?
A) All organisms consist of one or more cells. B) All cells arise from preexisting cells. C) The cell is the basic unit of structure for all organisms. D) All cells have a membrane-bound nucleus. E) none of the above
Why are viroids resistant to nucleases?
A. Having a circular RNA "genome," they are resistant to the digestion of most exonucleases (that nibble/digest the free ends of RNA or DNA). B. Having a circular RNA "genome," with no protein shell, they are resistant to the protein-degrading activities of nucleases. C. Nucleases will only digest DNA, not RNA-so viroids are protected. D. Viroids have only been identified in plants. Plant nucleases cannot digest RNA.
When molecules are broken apart in respiration
a. the heat produced is used to drive biological reactions. b. the oxygen in the compounds that are broken apart is used as an energy source. c. the energy released in respiration is channeled into molecules of ATP. d. ATP is converted into ADP. e. ADP is released as a waste product.