In eukaryotes, the normal or default state is that genes are turned _____
A) off through their association in nucleosomes
B) off through their association with exons
C) on through their association with exons
D) on through their association in nucleosomes
Answer: A
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DNA and RNA contain functional units known as:
A. peptides. B. enzymes. C. amino acids. D. nucleotides. E. fatty acids.
Signal molecules that determine relative positions during development are known as
A. inductors. B. organizers. C. cadherin domains. D. derepressers. E. morphogens.
If the sperm cell contributes mitochondria to the oocyte, it is called _______
A. paternal leakage B. maternal leakage C. paternal inheritance D. mitochondria E. imprinting
The ability to determine where a sound is coming from depends primarily on
A. differences in sound intensity in the two ears. B. differences in time of sound arrival to the two ears. C. differences in sound frequency received at the two ears. D. differences in both frequency and intensity at the two ears. E. None of these choices are correct.