________ occurs when an external signal does NOT directly enter the cell but instead is detected by a sensor that transmits it to the rest of the regulatory machinery
a. Quorum sensing
b. Sensory transduction
c. Signal transduction
d. Two-component regulation
Answer: C
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A. isotope. B. isomer. C. ion. D. monomer.
Gram ________ bacteria stain purple and have a very simple cell wall, only consisting of peptidylglycan:
A. Positive B. Negative
It became apparent to Watson and Crick after completion of their model that the DNA molecule could carry a vast amount of hereditary information in which of the following?
A) sequence of bases B) phosphate-sugar backbones C) complementary pairing of bases D) side groups of nitrogenous bases
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a. afferent nerves. b. efferent nerves. c. interneurons. d. the spinal cord. e. the brain.