Acetyl groups attached to histone tails generally indicate that the genes associated with this nucleosome will be
transcriptionally inactive Indicate whether the statement is true or false.
False - active
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The internal pH of most cells is near neutral. This allows
a. water to break down into H+ and OH-. b. enzymes within the cells to act at peak efficiency. c. the buffers produced within the body to affect these cells. d. enzymes outside of these cells to function. e. rapid fluctuations between acidic and basic conditions within the cells.
How are the pulmonary veins and the umbilical veins similar?
A. They both carry blood to the lungs. B. They both connect to the superior vena cava. C. They are both present in an adult human. D. They both connect to the placenta. E. They both carry oxygen-rich blood.
The spongy body running the length of the underside of the penis is the _____.
A. coronal ridge B. corpora cavernosa C. corpus spongiosum D. coronal sponge
When did humans begin the practice of agriculture?
A) 400,000 years ago B) 240,000 years ago C) 11,000 years ago D) 2,000 years ago