UT Arlington BIOL BIOL 3427 - Plant Cell Structure and Review (8 pages)

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Plant Cell Structure and Review



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Plant Cell Structure and Review

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This lecture note describes in detail the Plant cell cycle, and some basic Biology introductory topics such as Carbs, lipids, and Nucleic Acids


Lecture number:
2
Pages:
8
Type:
Lecture Note
School:
University of Texas at Arlington
Course:
Biol Biol 3427 - Plant Science
Edition:
1

Unformatted text preview:

BIOL 3427 1st Edition Lecture 2 Outline of Current Lecture Plant Cells Chapters 2 and 3 and a tiny bit of 4 Current Lecture Chapter 2 Review of Organic Molecules organic molecules four major types in living organisms carbohydrates lipids proteins nucleic acids Carbohydrates sugars Monosaccharides most hydrophilic function Glucose Ribose Primary source of chemical energy 5C Sugar Disaccharides Sucrose Glucose and fructose Form of sugar transport from leaves and plant body Polysaccharides Starch 1 Amylose Unbranched Chain of glucose Cellulose Primary storage polysaccharides in plants made of glucose Principal structural component of cell wall made of glucose Not digestible by plants only microorganisms Chitin Principal component of fungal cell walls and exoskeleton of insects and crustaceans Lipids fats and fatlike substances hydrophobic function Energy storage Triglycerides 3 Fatty acids glycerol Structural purposes Phospholipids in cell membrane fats and oils phospholipids triglycerides energy storage in seeds and fruits tend to be unsaturated double bonded Carbon in structure liquid at room temperature Examples include Sunflower peanut and corn oil Form phospholipid bilayer in cell membrane Hydrophobic polar bonds outward Hydrophilic nonpolar fatty acids tails inward barriers to water loss cutin 2 Covers outer wall of epidermal cells in stems leaves suberin In walls of cork outer bark cells waxes Most water repellant found in Carnarba Wax palm leaves steroids Have four interconnected hydrocarbon rings cell membranes Sterols stabilize phospholipid tails hormones Antheridiol in water mold Brassins promote growth in certain stems Estrogen Proteins polymers of amino acids function Diverse functions Storage forms of amino acids for embryo use in seeds protein structure influences function secondary structures are fibrous proteins that provide shape and support Enzymes membrane proteins transport proteins and structural proteins are tertiary globular structures enzymes



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