Both prokaryotic and eukaryotic cells use ________ to turn certain genes on or off.
proteins
You might also like to view...
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
In a fungus, a complex multicellular reproductive structure is called:a
a hypha. b. a gametangium. c. a fruiting body. d. an oogonium. e. an antheridium
Vaccination triggers an immune response which produces ________ immunity.
A. artificial passive B. natural passive C. natural active D. artificial active E. both active and passive
Why might the analysis of endosymbiotic bacterial genomes be misleading for understanding the minimal gene set?
a. They may have lost genes that would have been essential to early life-forms because they may have reduced metabolic requirements. b. They may have gained genes to be able to live within another organism. c. They are bacteria and therefore have nothing in common with LUCA. d. Their genes can be disrupted by transposons.