Essentials of Biology

1. According to the characteristics of life discussed in the course, a rock is not considered life. Choose one characteristic of life to defend why a rock is not life.
2.Devise an experiment that tests the effects of changing salt concentrations on regeneration of brain cells in Alzheimer’s patients. Describe the independent variable, dependent variable and controls you put in your investigation.
3.Name two kingdoms described in the six-kingdom system of taxonomy. Describe two differences between the two kingdoms. How are the two kingdoms the same?
4. Compare how ionic, non-polar covalent and polar covalent bonds differ from each other. Be sure to include the following terms in your comparison: electronegativity, stability and polarity.
5. For question number 2, give an example of a compound formed by each of the type of bonds listed. Make sure to give a description of the electron arrangement involved in each bond.
6. Why is carbon the building block of life? Describe the chemical characteristics of carbon that make it our unique building block.
7. Name the four macromolecules present in all living organisms and explain one function of each type.
8. How can you distinguish between a saturated fat and an unsaturated fat at the molecular level? Explain.
9. A cell suddenly loses the ability to produce amino acids. Predict what would happen to this cell and explain your prediction.
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