If the K+ channels of an excitable plasma membrane were blocked by the action of a drug, which of the
following would be disrupted?
a. repolarization
b. depolarization
c. hyperpolarization
d. repolarization and depolarization
e. repolarization and hyperpolarization
E
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One strand of DNA is 5' - AGGCCTTA - 3'. What is the opposite strand?
A. 5'–AGGCCTTA–3' B. 5'–TCCGGAAT–3' C. 3'–AGGCCTTA–5' D. 3'–TCCGGAAT–5'
Farmland that is under regular and continued tillage will not ____
a. undergo succession b. produce a climax community c. experience competition d. suffer from the effects of disturbance e. develop species diversity
"K" is the chemical symbol for
A. phosphorus. B. potassium. C. nickel. D. krypton. E. copper.
What is the main function of the TATA-binding protein?
A. to inhibit DNA replication until S phase B. to inhibit transcription until transcriptional activators bind C. to help initiate DNA replication D. to promote initiation of transcription