Why are weak chemical interactions so important in biological systems?
What will be an ideal response?
Because these interactions are weak, they are more easily reversed. This allows proteins to change shape or alter interactions with other molecules when necessary. It also allows DNA strands to separate for replication and transcription and yet reform easily when finished.
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Archaea have very diverse environmental requirements and tolerances. From what you have learned about them, which among the following conditions or substances do ALL archaeans require for survival and reproduction?
A. oxygen B. water C. moderate pH D. moderate temperature E. moderate salinity
Which organisms are considered most primitive based upon the structure of their limbs?
a. bats b. reptiles c. porpoises d. penguins e. birds
The four basic animal tissues are:a
connective, digestive, nervous, and respiratory. b. blood, bone, connective, and epithelial. c. epithelial, connective, muscle, and nervous. d. digestive, nervous, reproductive, and respiratory. e. circulatory, excretory, respiratory, and sensory.
Some bacteria, including many that cause disease, attach to surfaces using external ________ or slime ________ and/or hair-like protein strands called attachment ________
Fill in the blank(s) with correct word