A nucleotide may consist of
a. deoxyribose or ribose.
b. purines or pyrimidines.
c. phosphate groups.
d. all of the above.
a
Biology & Microbiology
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An example of a prezygotic isolating mechanism is behavioral isolation
Indicate whether the statement is true or false.
Biology & Microbiology
A solution with a pH of 7.4 ____
a. is considered an acid b. has more H+ than OHc. has equal numbers of H+ and OHd. has a pH similar to ammonia e. is similar in acidity to normal body fluids
Biology & Microbiology
The promotion of the lac operon in bacteria is ________________________.
A. activated by a repressor protein B. dependent on lactose concentration C. dependent on glucose concentration D. regulated by RNA polymerase E. regulated by mRNA
Biology & Microbiology
The resting potential for a neuron is about _______ mV.
a. 0 b. -55 c. -70 d. -100
Biology & Microbiology