Possible genetic modifications that can cause epigenetic changes in gene expression include: (Select all that apply)
A. DNA methylation.
B. histone variant localization.
C. genomic imprinting.
D. chromosomal inversion.
E. mRNA degradation.
F. histone acetylation.
G. chromatin remodeling.
Answer:
A. DNA methylation.
D. chromosomal inversion.
E. mRNA degradation.
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A) acquires transient immunity, which prevents subsequent infection for about a year. B) acquires no immunity, and thus could be reinfected immediately. C) requires immunization by a vaccine. D) requires immunization by an antiserum.
Which of the following changes will result in decreased blood flow to a tissue?
A. Decreased peripheral resistance B. Decreased vessel diameter C. Increased blood pressure D. Relaxation of precapillary sphincters E. Increased blood volume
The pressure needed to stop osmosis is:
What will be an ideal response?
Some, but not all, virus capsids are surrounded by
A. either DNA or RNA. B. a protein spore coat. C. both DNA and RNA. D. a protein capsid. E. a membranous envelope.