Essential Biology Text Essay

Lipids: – Function: Long-term energy storage: fats); Hormones: steroids) – Examples: Fats: triglycerides); Steroids: testosterone, estrogen), oils – Basic component: Fatty acid, Glycerol – 3 classes of lipids: o Oils, fats, waxes: meat, butter, cheese Phosphoric (cell membrane): NAS a polar head that is hydrophilic- water loving & monopole tails that are hydrophobic- water fearing o Steroid: consists of carbon rings 3.

Proteins: – Function: Enzymes, structure, storage, contraction, transport, and others – Basic component: amino acids – Amino acids are linked up by peptide bonds – Examples: Lactate- an enzyme, hemoglobin- a transport protein Structural & functional: Amino acid structure: amino group, carbonyl group and side group – Specific sequence of an amino acids in a protein is its primary structure – A slight change in the primary structure off protein affects its ability to function- Shape is sensitive o surrounding environment Temps & pH changes can cause denomination- unravels & loses its shape (high fevers can do this 4.

Nucleic acids: – Function: Information storage – Basic component: Phosphate, Base, Sugar- Ribose – Examples: DNA, RNA – are composed of nucleotides – Both DNA & RNA are molecules of heredity – Other nucleotides are energy carriers – linked by phosphoresce bonds – Taps adenosine troposphere: provide energy for the cell to carry out work Chapter 4: Plant vs.. Animal cell (know differences) Plant cells: cell wall, chloroplasts and central vacuole Animal cells: contain Centurion and Lissome which plant cells do not have.

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Round shape Organelles (know their function(s): “Little organs” Most important organelle is the nucleus- stores DNA Endoplasmic reticulum: Rough ERE: produces proteins for the growing ERE membrane Smooth ERE: Googol apparatus: receives, refines, stores and distributes chemical products of the cell. Lissome: breaks down large molecules (proteins, polysaccharides, fats and nucleic acids) Chloroplasts: performs photosynthesis-Plants cells only Mitochondria: produces adenosine troposphere (Taps) Cell Junctions/connections


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