Micro Organisms
Which of the following may account for the small size of the cells?

All of these
The surface area/volume ratio
The number of mRNAs that can be produced by the nucleus
The rate of diffusion

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Micro Organisms
A characteristic of protein synthesis in both the archaea and eukarya is

transcription and translation are coupled
the initiator tRNA is charged with N-formyl-methionine
proteins are synthesized from D-, rather than L-, isomers of amino acids
translation is inhibited by diphtheria toxin

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Micro Organisms
The unifying feature of the archaea that distinguishes them from the bacteria is

presence of a cell wall containing a characteristic outer membrane
cytoplasmic ribosomes that are 70S
habitats which are extreme environments with regard to acidity
absence of a nuclear membrane temperature

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