Its a thing used in photosynthesis <span />
A, B, D, F are the gated embedded
proteins in model 1 allow potassium ions through the membrane. Sodium ions are
necessary for regulation of blood and body fluids, transmission of nerve
impulses, heart activity, and certain metabolic functions. Physiologically, it
exists as an ion in the body.
B.) Adenine because Dictated by specific hydrogen bonding patterns, Watson-Crick base pairs (guanine-cytosine and adenine-thymine) allow the DNA helix to maintain a regular helical structure that is subtly dependent on its nucleotide sequence.
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