Question

1. What are the three domains of life?
2. Are humans prokaryotic or eukaryotic?
3. What are the four elements that make up ~96% of the human body?
4. Name the four properties that make water such a cool molecule for life.
5. Does molecule shape have any importance in biology?

Oil is considered to be _________________________ (hydrophobic/hydrophilic)

Answer 1

1) three domains are the Archaea, the Bacteria, and the Eukarya.

2) Humans along with animal species and plants are created by eukaryotic cells. Organism that are created with prokaryotic cells are bacteria and archaea. However each cells hold similar attributes. Example, eukaryotes and prokaryotes both contain a plasma membrane, this prevents extracellular materials entering the cell.

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3) Roughly 96 percent of the mass of the human body is made up of just four elements: oxygen, carbon, hydrogen and nitrogen, with a lot of that in the form of water. The remaining 4 percent is a sparse sampling of the periodic table of elements

4)Water is essential to life because of four important properties: cohesion and adhesion, water's high specific heat, water's ability to expand when frozen, and its ability to dissolve a wide variety of substances.

5) The precise shape of a molecule is usually very important to its function in the living cell. Molecular shape is crucial in biology because it determines how biological molecules recognize and respond to one another with specificity.

6) Oils are hydrophobic because their molecular structure is non-polar; there is no charge or partial charge localized to any part of the molecule.