Which disorder is more common among the babies of older mothers?
A) Turner syndrome
B) Klinefelter syndrome
C) Trisomy X
D) XYY syndrome
E) Down syndrome
E
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If one strand of a DNA molecule has the sequence of bases 5'ATTGCA3', the other complementary strand would have the sequence _____
A) 5'TAACGT3' B) 5'TGCAAT3' C) 5'UAACGU3' D) 3'UAACGU5' E) 5'UGCAAU3'
Autosomes represent ____
a. all chromosomes including the sex chromosomes b. the half of the chromosomes inherited from one parent c. all chromosomes other than the sex chromosomes d. chromosome pairs with unlike members e. those chromosomes found only in gametes
You have added a specific amount of excitatory neurotransmitter mixed with a 6× higher concentration of an inhibitory neurotransmitter to a synaptic cleft. You expect that the postsynaptic neuron will
A) produce 6× its normal number of action potentials. B) produce 6× its normal number of negative action potentials. C) show a net hyperpolarization as a result of neuronal integration. D) show a net depolarization as a result of neuronal integration. E) not respond to either signal.
How can you tell the difference between the sound of a tuba and that of a flute?
A. Each part of the spiral organ is sensitive to different wave frequencies. B. Lower pitches activate all three bones of the middle ear, while higher pitches only activate one or two. C. The cochlear nerve fires more frequently for higher pitches and less frequently for lower pitches. D. The brain interprets pitches based on the strength of the sound waves. E. Lower pitches cause the tympanic membrane to vibrate, while higher pitches vibrate the vestibular canal.