Part of the reason for the charge difference inside and outside a neuron's membrane is:
A) positively charged proteins outside the membrane.
B) positively charged proteins inside the membrane.
C) excess potassium outside the membrane.
D) excess sodium inside the membrane.
E) negatively charged proteins inside the membrane.
Answer: E
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The enzyme dicer chops dsRNA molecules into small pieces of
A. mRNA and miRNA. B. miRNA and siRNA. C. siRNA and rRNA. D. mRNA and siRNA.
The equation that describes the relationship between phenotypic variance, genetic variance and environmental variance is
A. VP = VG + VE B. 1 = VG + VE + VP C. VE = VG + VP D. VG = VP + VE
As the action potential peaks, ____
a. the activation gates of Na+ channels close b. the inactivation gates of Na+ channels close
c. the activation gates of K+ channels close d. the inactivation gates of Na+ channels close e. Na+/K+ active transport pumps are activated
Which of the following statements about the botulism toxin is NOT true?
a. It is an exotoxin. b. It is produced by the bacterium Clostridium. c. It may be found as a contaminant in poorly prepared food. d. Its brand name is Botox. e. It causes muscles to contract.