HESI A2 Biology Study Guide
Hierarchic Organizational system for nomenclature (Ans- Kingdom Phylum Class Order Family Genus Species (Least) "Keep Penguins Cool Or Find Good Shelter"
Scientific Method (Ans- Observation Hypothesis Experiment Conclusion
Water (Ans- All life, and therefore biology , occurs in water.
Properties of Water (Ans- 2 Hydrogen bonds Covalently bonded to Oxygen.
Hydrogen Bonding between molecules.
- High specific heat
- Large bodies or water stabilize climates
- Strong cohesive and adhesive properties
- Water freezes forms a lattice crystal resulting in ice floating in water.
- Polarity of water allows it to act as a universal solvent.
- Water can be used to dissolve different solvents.
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Carbohydrates (Ans- Long chains, or polymers of sugar. Most importantly form the backbone of DNA and RNA.
Saturated (Ans- Clogs arteries. NO DOUBLE BONDS in their hydrocarbon tail. SOLID @ room temperature.
Unsaturated (Ans- Double bond in their hydrocarbon tail. LIQUID at room temperature.
Phospholipids (Ans- Phosphate group (polar) soluble in water. Hydrocarbon tail of fatty acids is nonpolar and nonsoluble in water.Ex. Cell Membrane
Steroids (Ans- Are lipids, which are precursors to hormones and drugs
Proteins (Ans- They are Polymers of 20 molecules called Amino Acids. Enzymes are a type of protein, which catalyze different reactions or processes.LARGEST Biological Molecule
Cell (Ans- Fundamental unit of biology
Prokaryotic Cells (Ans- NO defined nucleus and NO membrane- bound organelles.
Eukaryotic Cells (Ans- Membrane-enclosed nucleus and series of membrane-bound organelles that carry out the functions of the cell as directed by the genetic information contained in the nucleus.
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