The p300/CBP (CREB-binding protein) proteins are histone acetyltransferases that help regulate the transcription of many genes. Based on this information, you can conclude that these proteins
A. physically connect activator proteins.
B. recruit helicases.
C. acetylate purines.
D. remodel chromatin.
Answer: D
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Homologous chromosomes separate in ________ and sister chromatids separate in ________
a. meiosis I / meiosis II only b. meiosis II / meiosis I c. both meiosis I and meiosis II / both meiosis I and meiosis II d. meiosis I / meiosis II and mitosis
The experiments of Hershey and Chase
1.used radioactive phosphorus to label DNA and radioactive sulfur to label proteins. 2.used radioactive sulfur to label DNA and radioactive phosphorus to label proteins. 3.used mice. 4.demonstrated the transforming principle. 5.showed that protein entered the bacterial cells.
Joe cut his finger on a sharp twig and now is experiencing dolor. This means
A. pain. B. swelling. C. loss of function. D. redness. E. warmth.
Microbes that naturally live within mammalian hosts are
a. psychrotolerant. b. mesophiles. c. thermophiles. d. xerophiles.