The shifting of membrane fluidity from a gel-like to a more liquid state is known as ________.
Fill in the blank(s) with the appropriate word(s).
phase transition
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A Rossmann fold most likely is created when:
A. the ?-?-? motif is repeated within a polypeptide. B. the Greek key motif is repeated within a polypeptide. C. an ? helix facilitates the creation of a ?-?-? barrel structure. D. an ? helix prevents the creation of a ?-?-? barrel structure. E. a dimer contains subunits that are mirror images.
M. pneumoniae is detected as the most common agent of lower respiratory tract infection among:
a. previously healthy patients 2 months to 5 years of age. b. adults younger than 30 years of age. c. community-acquired pneumonia in adults. d. school-age children.
When a neuron is at rest,
a. there is a voltage difference across the membrane of about ?70 millivolts. b. the interior is positively charged. c. it is responding to a stimulus. d. the fluid outside the membrane has more sodium and less potassium than the cytoplasm. e. axons are firing at a faster rate.
In the DNA molecule, hydrogen bonds form between _____.
A) sugar and phosphate groups B) base pairs C) the nitrogen base and sugar groups D) phosphate groups and the nitrogen base