Although the chromatin structure of interphase and mitotic chromosomes is very compact, DNA-binding proteins and protein complexes must be able to gain access to the DNA molecule
Chromatin-remodeling complexes provide this access by __________________.
(a) recruiting other enzymes.
(b) modifying the N-terminal tails of core histones.
(c) using the energy of ATP hydrolysis to move nucleosomes.
(d) denaturing the DNA by interfering with hydrogen-bonding between base pairs.
(c)
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Which of the following is mismatched?
a. acetylcholine; muscle contraction b. endorphin; pain perception c. norepinephrine; fight-or-flight response d. serotonin; sexual function e. GABA; major inhibitor in the brain
Which of the following designates a normal human female?
a. XXY b. XY c. XX d. XYY e. XO
Diagram a typical life cycle for a basidiomycete. What will be an ideal response?
The gap between the transmitting and receiving neurons in a chemical synapse is known as the
A) node of Ranvier. B) ion channel. C) gap junction. D) synaptic cleft.