What is the typical resting potential of an isolated neuron?
a. -60 mV
b. -70 mV
c. -80 mV
d. -90 mV
e. 100 mV
ANSWER: b
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All mRNA transcripts begin with
a. methionine. b. a ribosome. c. AUG. d. the P site. e. an anticodon.
After three replication cycles in PCR, there will be a total of three double-stranded DNA molecules.
Answer the following statement true (T) or false (F)
In which of the situations below would a plant be at greatest risk for the formation of air bubbles in the xylem stream?
A. during the night, when transpiration is low B. during the afternoon, when transpiration is highest C. in the early morning, with cooler temperatures and calm winds D. in the day during a drought E. the risk is the same at any time of day
PCR uses a special DNA polymerase that
a. resists low temperatures. b. resists acids. c. resists bases. d. resists high temperatures. e. resists centrifugation.