The influence of environmental factors on DNA packaging is called
A) epigenetics
B) supercoiling
C) transcription
D) horizontal gene transfer
Ans: A) epigenetics
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Refer to Figure 44-2. Cell type__________ is/are primarily responsible for the release of histamine in
injured tissues and in allergic responses. a. A only b. B only c. C only d. D only e. A and cell type D
When compared to ribosomes in free polyribosomes in the cytosol, rough ER-bound ribosomes have
a. different large and small subunits. b. the same large and small subunits. c. different large subunits but the same small subunits. d. different small subunits but the same large subunits.
Which structures have the same length, shape, and centromere location?
A. Karyotypes B. Histones C. Bacteriophages D. Nucleosomes E. Autosome pairs
When interleukin-2 is released in response to a virus invading body cells, ________ are activated.
A. neutrophils B. mast cells C. helper T cells D. cytotoxic T cells