The octameric histone core is composed of four different histone proteins, assembled in a stepwise manner. Once the core octamer has been formed, DNA wraps around it to form a nucleosome core particle
Which of the following histone proteins does not form part of the octameric core?
(a) H4
(b) H2A
(c) H3
(d) H1
(d)
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Which of the following represents an abundant element found in living organisms?
A. calcium. B. iron. C. iodine. D. hydrogen. E. sodium.
The methanobacteria, halobacteria, and sulfobacteria are included in which domain?
A) eubacteria B) protista C) blue-green algae D) archaea E) all of the above
"Perception" differs from "sensation" when
referring to a stimulus in a. the type of receptor stimulated. b. understanding the significance of the stimulus. c. the number of receptors that depolarize. d. feeling exactly what is happening at the site. e. responding to the stimulus
All of the following teeth are found in adult vertebrates except
A. molars. B. incisors. C. premolars. D. precanines. E. canines.