Which of the following will increase the speed of an action potential moving down an axon?
I) Action potentials move faster in larger diameter axons.
II) Action potentials move faster in axons lacking potassium ion channels.
III) Action potentials move faster in myelinated axons.
A) only I and II
B) only II and III
C) only I and III
D) I, II, and III
Answer: C
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A. allopatry B. fidelity C. mate choice D. preferability
How do histones bind to DNA?
a. by an ionic attraction to the nitrogenous bases of DNA b. by hydrogen bonding with the nitrogenous bases of DNA c. by hydrogen bonding to the deoxyribose sugars of DNA d. by an ionic attraction to the phosphate groups of DNA
DNA carries genetic information in its
A) sequence of bases. B) helical form. C) tertiary structure. D) phosphate groups. E) sugar groups.
Which category of organic molecule stores genetic information?
a) proteins b) lipids c) nucleic acids d) carbohydrates