Which type of microscope would allow the viewer to see ribosomes inside a cell?
a. A light microscope, transmission electron microscope, and scanning electron microscope can all view ribosomes inside a cell.
b. A light microscope
c. A transmission electron microscope
d. A scanning electron microscope
Answer: c. A transmission electron microscope
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Phylogenetic oligonucleotide arrays (POAs) contain rRNA sequences as probes and are used as a means to detect complementary rRNA sequences from the environment.
Answer the following statement true (T) or false (F)
What led to the increase in oxygen levels in the atmosphere on primitive Earth?
a. the first photosynthetic reactions b. photosynthetic cells that used water and not H2S as a source of electrons c. the development of cellular respiration pathways in cells d. the use of glycolysis in cells e. photosynthetic pathways that stripped oxygen off of carbon dioxide and retained only the carbon in subsequent steps
Which of the following was not an energy source on early Earth?
A. meteorites B. ultraviolet radiation C. lightning D. ozone layer E. volcanoes
Some bacteria are resistant to antimicrobials due to the activity of ________, which removes many of them
A) plasmids B) porins C) efflux pumps D) lipopolysaccharides E) ribosomes