What part of the brain sorts incoming information, such as touch signals from your hand, into categories before relaying it to the cerebral cortex?
A) thalamus
B) hypothalamus
C) pons
D) hippocampus
Answer: A
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The discovery of ____ suggested that nucleic acids likely existed prior to proteins
a. RNA b. ribozymes c. RNA polymerase d. peptide bonds e. endoplasmic reticulum
Of the following statements concerning the sympathetic and parasympathetic branches of the nervous
system, which is true?
a. The sympathetic system controls external stimuli, while the parasympathetic system controls internal stimuli. b. The sympathetic system generally produces an increased physical activity, while the parasympathetic system produces a decrease in physical activity. c. Both nervous systems stimulate the activities of many organs. d. Both nervous systems release norepinephrine. e. The sympathetic system is under voluntary control, and the parasympathetic system is under involuntary control.
Which statement below provides an explanation of why a lagging strand (rather than two leading strands) exists during DNA replication?
a. New nucleotides can be added only to a 3? (–OH) end. b. Only one primer can exist at a time. c. There is only one DNA polymerase per cell. d. There is only one replisome per cell.
The number of protons in a given atom is equal to its:
A. neutron number B. mass C. atomic number D. molecular number