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genetic code

the instructions in genes that “tell” the cell how to make specific proteins. The code resides in the sequence of bases occurring as constituents of the genetic material, DNA or RNA. These bases are represented by the letters A, T, G, and C (which stand for adenine, thymine, guanine, and cytosine, respectively). In messenger RNA, uracil (U) replaces thymine. Each unit, or codon, of the code consists of three consecutive bases. Hence, there are 64 possible triplet combinations of the four bases, which specify the amino acids that make up each protein molecule.

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Psychology term of the day

May 21st 2024

attachment theory

attachment theory

a theory that (a) postulates an evolutionarily advantageous need, especially in primates, to form close emotional bonds with significant others: specifically, a need for the young to maintain close proximity to and form bonds with their caregivers; and (b) characterizes the different types of relationships between human infants and caregivers. These relationships have been shown to affect the individual’s later emotional development and emotional stability. See also insecure attachment; secure attachment; Strange Situation. [originally developed by John Bowlby and later expanded by Mary D. Salter Ainsworth]