RNA is believed to have evolved before DNA and proteins
Indicate whether the statement is true or false
TRUE
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While the maximum number of electrons required to fill the outermost shell of an atom varies depending on the size of the atom, almost all of the smaller atoms (atomic numbers 2-20) are considered stable, and thus nonreactive, when they contain ________ electron(s) in the outermost shell.
A. 1 B. 8 C. 16 D. 2
What determines the specificity of the hypervariable region of an antibody?
A. the epitope B. disulfide bond formation C. genomic rearrangement D. the heavy chain of the antibody
The most significant finding from the "split brain" patients studied by Roger Sperry and his collaborators was that
A. in most human brains, the left hemisphere is specialized for processing verbal and symbolic material; the right hemisphere is specialized for visuospatial and emotional processing. B. the right and left hemispheres are mirror images of each other and equally dominant in producing and understanding language in humans. C. to evaluate the functional capacity of each hemisphere in split-brain patients, it is essential to provide information to one side of the brain only. D. the severing of the corpus callosum is a necessary and effective remedy for halting grand mal seizures in epilepsy.
The sarcoplasmic reticulum stores ions that are necessary for skeletal muscle contractions. Which of the following ions does it store?
A) magnesium B) calcium C) iron D) sodium