BIO SCI 93 Lecture Notes - Lecture 2: Circadian Clock, Structural Level, Hydrogen Bond

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 93
• Professor: Jorge Busciglio Kim Green Marcelo A Wood

Document Summary

Biosphere -> ecosystems -> communities -> populations -> organisms -> organs/organ systems -> cells -> organelles -> molecules -> atoms. Circadian clock anticipates and adapts our physiology to certain times of the day. The maximum number of hydrogen bonds that a water molecule can form at any given. Oxygen, hydrogen, and carbon are the foundation for life. Cells are the lowest structural level capable of performing all activities of life. To understand the microscopic world, we need to understand units (milli, micro, nano) Angstrom (a with circle on top) = 0. 1 nanometer. Our body is made up of 70-90% water and carbon based compounds. Trace elements are sometimes present but are very important. Iodine (thyroid function), zinc and copper (for enzymes, modulators of neural activity), Compounds are different from molecules in that they are different elements combined in. Hydrogen bond: covalent bond (strong) and a second weaker bond [makes it. Slightly negative on oxygen side, slightly positive on hydrogen side.