The chief protein components of chromatin, called histones, serve what role?
a) they help organize and condense the DNA by forming nucleosomes
b) they come together to form the sugar-phosphate backbone of the DNA
c) they catalyze important chemical reactions within the nucleus
d) they undergo complementary base pairing and help hold the double-stranded DNA molecule together
a) they help organize and condense the DNA by forming nucleosomes
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The movements known as dorsiflexion and plantar flexion involve moving the
A) hand. B) arm. C) foot. D) leg. E) hip.
Which of the following muscles elevates the soft palate?
A) superior constrictor B) levator veli palatine C) laryngeal elevators D) inferior constrictor
In the stomach, ________ cells secrete pepsinogen.
Fill in the blank(s) with the appropriate word(s).
What is the function of the corpora quadrigemina?
A) They are important for the sense of taste. B) They are important for maintaining balance. C) They are reflex centers for visual and auditory stimuli. D) They are olfactory relay centers.