Which of the following is not a chemical modification commonly found on core histone N-terminal tails?
(a) methylation
(b) hydroxylation
(c) phosphorylation
(d) acetylation
(b)
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Lichens are a mutualistic association of a fungus and either an alga or a cyanobacterium in which
A) the fungus protects the photosynthetic partner from erosion. B) the fungus slowly engulfs the photosynthetic partner. C) the fungus helps collect sunlight for the photosynthetic partner. D) the phototroph provides phosphorus to the fungus.
Describe the pathway of sperm during ejaculation, from production to exiting the body. Include the contributions of various accessory ducts and glands
What will be an ideal response?
All of the following are viral infections, except
A. hepatitis. B. warts. C. HIV/AIDS. D. herpes. E. chlamydia.
The word prokaryotic means
a. having many nuclei. b. having two nuclei c. before the nucleus. d. having a membrane-bound nucleus. e. having a nucleus with no DNA.