How are some plant viroids and virusoids similar to Tetrahymena group I introns?

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Ans: Viroids and virusoids are infectious RNA molecules that differ only in whether they are encapsulated by protein – virusoids are, viroids are not. They are similar to group I introns in that they are ribozymes; they form a secondary "hammerhead" structure that allows them to self-cleave.

Biology & Microbiology

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The overall results represented in Figure 18.7 suggest that offspring exhibit an average phenotype that is more different from the population mean than that of their parents

A. true B. false

Biology & Microbiology

Synaptic integration is most accurately described as

A. the summing of multiple excitatory or inhibitory influences in a postsynaptic neuron. B. the fusing of presynaptic and postsynaptic membranes. C. the binding of Ca2+ ions to secretory vesicles in presynaptic neurons. D. the binding of secretory vesicles to the presynaptic neuron membrane. E. the enzymatic degradation of neurotransmitters in the synaptic cleft.

Biology & Microbiology

Is a fungal mycelium made up of uninucleate, binucleate, or multinucleate cells? Defend your answer

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Biology & Microbiology

As the surface area of a body increases, its volume increases at the same rate

Indicate whether the statement is true or false

Biology & Microbiology