Collagen a. has a very regularly repeating primary protein structure. b. is a protein found in hair, among other things. c. is a dimer of two intertwined helices. d. has a very compact, springy structure. e. is composed almost entirely of beta-pleated sheets.

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.

Which of the following is not one of the mechanisms of enzyme catalysis by which the substrate is converted to the product? a. changing substrate orientation b. changing substrate reactivity c. inducing strain in the substrate d. preventing an induced fit d. preventing an induced fit