[BIO 151] - Midterm Exam Guide - Ultimate 16 pages long Study Guide!

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CMU
BIO 151
MIDTERM EXAM
STUDY GUIDE
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BIO 151- Chapter 1 , Part 1 Notes
All living things share common characteristics (7 of them)
1. Molecules of Life:
o DNA Nucleic Acid
o Proteins - Amino Acids
o Carbohydrates (Sugar)-short energy
o Lipids (Fats)- store energy
2. Composed of Cells:
o Smallest unit of life
o Exhibits characteristics of life
o Grow, reproduce and repairs themselves
3. Grow and Reproduce:
o Copy genetic material
o Pass on genetic material
4. Use Energy:
o Extract energy to do work
o Metabolism-chemical reactions to build
molecules
o To break down molecules
ATP-form of energy a cell
uses
Enzymes (proteins)-
metabolism- speed up
chemical reactions
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2
5. Respond to their environment:
o Stimulus
o React
o i.e. Humans: Nerves and Muscles
6. Maintain Homeostasis:
o Interval environment is constant
Temperature 98.6 degrees
pH
7. Populations Evolve and Develop Adaptable traits:
o Genetic changes over time
o Adaptive traits help living things survive
and reproduce
o Antibiotic resistant- genetic change (ex.
MSA)
Evolution: Unifying theme
o Unity all descended from the first cells
o Diversity adaptive traits new species
o Science: organize by similarity- groups called domains!
Domains:
o Bacteria-single cell
o Archaea- soe sigle cell ost ulti-celled
o Eukarya- all multi-celled
Biological Organization:
o Molecule
o Cell
o Tissues
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