Optic components: cornea, lens, vitreous body, and the aqueous body b. Not an optic component of the eye: retina 87. Glaucoma is a state of elevated pressure within the eye that occurs when ___ is obstructed so that the _____ is not reabsorbed as fast as it is secreted. a. Occurs when the scleral venous sinus is obstructed so the aqueous humor is not reabsorbed as fast as it is secreted.
Substitution mutation. Definition. A type of point mutation in which a single nucleotide is substituted with (or exchanged for) a different nucleotide that may result in an altered sequence of amino acid during translation, which may render the newly synthesized protein ineffective. Supplement.
noun, plural: point mutations. A mutation in DNA or RNA molecule involving a change of only one nucleotide base. Supplement. This type of mutation occurring in noncoding sequences often does not result in an altered amino acid sequence during translation.