Which of the following is false about the E. coli Lac operon?
A. it is an example of negative control
B. the presence of lactose acts as an inducer
C. the repressor binds to the operator
D. the mRNA for the receptor binds to the operator
D. the mRNA for the receptor binds to the operator
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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
All tissues and organs of an adult animal arise from
three primary tissue layers, or germ layers that form in early embryos: __________, __________, and __________ into blood. Fill in the blank(s) with the appropriate word(s).
Which term refers to the external form of a plant?
a. anatomy b. morphology c. physiology d. ecology
The most important electron carrier in cellular respiration is ________
Fill in the blank(s) with correct word