A cell can form 10 nm chromatin fibers, but not 30 nm fibers. Which molecule has likely been removed or mutated in this cell?
A) H1
B) H2A
C) H3
D) topoisomerase
E) SMC proteins
A
Biology & Microbiology
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What will be an ideal response?
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The liver stores energy in the form of a polysaccharide called:
A) fiber B) starch C) glycogen D) glucose E) cellulose
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A pharmaceutical company hires a chemist to analyze the purity of the water being used in its drug preparations. If the water is pure, the chemist would expect to find
A) only molecules of H2O. B) only H2O molecules and H+ ions. C) H2O molecules, H+ ions, and OH- ions. D) only H+ ions and OH- ions.
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The sodium/potassium pump is an example of:
A. a symporter. B. passive transport. C. an antiporter. D. channel-mediated diffusion. E. None of these choices is correct.
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