Micro Organisms
Which of the following is not true for eukaryotic cells?

Nucleus is bounded by nuclear membrane
Gas vacuoles are present
Chloroplasts and mitochondria contains 70S ribosomes
Chromosomes contain histones

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

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

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

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

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