If a heterotrophic bacterium were grown in a minimal glucose medium and transferred during exponential growth phase into the complex LB medium, the cell would have a relatively
a. short exponential phase because it already is in exponential growth phase.
b. high growth yield compared to cells transferred during stationary growth phase.
c. long lag phase because it has to adjust to a different chemical environment/medium.
d. short lag phase because of the availability of amino acids and other nutrients.
Answer: D
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The release of neurotransmitter from the axon terminal is controlled by:
A. voltage-gated sodium channels. B. voltage-gated potassium channels. C. voltage-gated calcium channels. D. voltage-gated chloride channels.
A channel that opens in response to changes in ionic charge across a membrane is called a ____
a. voltage-gated channel b. ligand-gated channel c. charge-gated channel d. electric-gated channel e. positive-gated channel
Inside a skeletal muscle cell, a set of small cylinders called _______ are assembled into larger cylinders called _______.
Fill in the blank(s) with the appropriate word(s).
Which one of the following is characteristic of N. meningitidis but not N. gonorrhoeae?
A. Ferments glucose B. Contains a polysaccharide capsule C. Is oxidase-positive D. Most isolates show resistance to penicillin E. No effective vaccines are available