Describe how the sigma subunit (factor) of E. coli RNA polymerase participates in transcription
What will be an ideal response?
The sigma subunit may give specificity to the RNA polymerase and play a regulatory function. It may be involved in the recognition of initiation sites or promoters.
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A diminishing response by receptors to a
constant stimulus is a. perception. b. neural transduction. c. sensory adaptation. d. referred pain. e. characteristic of all receptors.
How do the muscles in your arm extend your arm outward?
A) The muscles in your arm push on the bones, causing your arm to extend. B) The muscles in your arm relax, and the tendons pull the arm straight. C) Some muscles in your arm relax, and others contract, pulling the arm straight. D) The top half of your bicep wraps around underneath the elbow like a rope over a pulley. When it contracts, the arm is pulled out straight.
Excessive use of antibiotics can negatively impact bone health through its effects on
What will be an ideal response?
What are the two categories of second-line defenses?
A) red blood cells and antibodies B) platelets and red blood cells C) assorted molecular factors and leukocytes D) antibodies and platelets E) mucus and lysozyme