EOC Review: Biochemistry, Enzymes, Cell, and Cell Transport Christopherson
Monomer Single molecule One subunit Example: Single bead for a necklace
Polymer Many molecules More than one subunit Example: Beads making up a necklace
Four Macromolecules: Carbohydrates
Monomer of a Carbohydrate Simple Sugar or Monosaccharide
Polymer of a Carbohydrate Complex sugar
Type of Carb: Monosaccharide Explanation: One sugar / Simple Sugar Example: Glucose or Fructose
Indicator: Benedict’s Solution
Positive Test: Turns Green to Red
Type of Carb: Polysaccharide Explanation: Many Sugars
Example of a Polysaccharides Cellulose: Provides structure for plants
Example of a Polysaccharide Starch: Stored Energy in plants
Examples of a Polysaccharide Chitin: Structure and support for insects and mushrooms
Indicator: Iodine
Positive Test: Turns Black
Example of a Polysaccharide Glycogen: Stored energy in animals
Carbohydrate Functions #1 Short term energy source Burn quickly Glucose
Carbohydrate Function #2 Stored Energy Organisms store what they don’t use Glycogen and Starch
Carbohydrate Function #3 Provide structure for plants, fungus, and insects
Four Macromolecules: Lipids
Lipids Also known as: Fats, Oils, and Waxes
Indicator: Brown Paper Bag or Towel
Positive Test: Grease Spot
Lipids Function #1 Long term energy storage
Lipids Function #2 Provide Insulation
Lipids Function #3 Regulate water movement in and out of the cell
Four Macromolecules: Proteins
Protein Monomers and Polymers
Indicator: Biuret’s
Positive Test: Turns Purple
Proteins Function #1 Make up the structure and function of muscles
Proteins Function #3 Blood has hemoglobin (protein) which helps transport oxygen
Proteins Function #4 Insulin (protein) helps glucose move from our bloodstream to our cells
Protein Function - #5 Enzymes (Protein) fuel every chemical reaction in organisms. Helps form bonds and break things down
Four Macromolecules: Nucleic Acids
Nucleic Acids Elements present: Only one with P Monomer: Nucleotide
Nucleic Acid Function #1 Responsible for an organisms genetic make-up (DNA)
Nucleic Acid Function #2 Usable form of energy (ATP)
Nucleic Acid – Function #3 Makes Proteins: RNA
Chemical Reaction Occurs when bonds are broken or formed to create a new substance Reactants Products
Characteristics of Enzymes #1 Enzymes are biological catalysts; speed up the rate of reaction
Example of Enzymes as Catalysts
Characteristics of Enzymes #2 Enzymes are site specific One enzyme = One job
How Enzymes Work
Environmental Effects on Enzymes 1.Temperature* High Temperatures can denature enzymes Denature means lose shape (active site).
Environmental Effects on Enzymes 1.pH Dramatic changes in the pH of a solution can denature an enzyme Decreasing enzyme activity
Eukaryotic Cell Definition Complex cells that have “membrane- bound” organelles. “Membrane-bound” means that they have an outer layer.
Two main types of Eukaryotic Cells 1. Animal Cell 2. Plant Cell
Nucleus Location: Large circle typically in the middle of the cell Function: Control center of the cell; location of DNA
Ribosomes Location: Small dots all over the cell Function: Location of protein synthesis; where proteins are made
Mitochondria Function: Breaks down sugar into ATP (usable form of energy); Powerhouse of the cell Location: Throughout the cell
Chloroplast Location: Green “beans” throughout a plant cell Function: Location of photosynthesis; process by which plants make food
Vacuole Location: Throughout an animal cell; makes up the majority of a plant cell Function: Stores water, food, waste, etc.
Location: Outer layer of the cell Function: Control what comes in and out of the cell; gatekeeper Cell/Plasma Membrane
Homeostasis The ability of an organism to adjust its internal environment to keep it stable.
Cell Wall Location: Layer outside of the cell membrane in some organisms Function: Provide structure and support
Plants Cell Wall
Bacteria Cell Wall
Fungus
Phytoplankton Cell Wall
Prokaryotic Cell Definition Simple cells that lack “membrane- bound” organelles. “Membrane- bound” means that they have an outer layer.
Examples of Prokaryotic Cells: Bacteria
Differences between Prokaryotic and Eukaryotic Cells
Cell Specialization Nerve Cell: Conducts messages throughout organisms
Cell Specialization Muscle Cell: Stretches and contracts like a rubber band; allows muscles to work
Cell Specialization Blood Cell: Shaped like flat discs; Allows for more surface area for oxygen attachment
Cell Specialization Sperm Cell: Possesses a tail; allows for movement to the egg
Cellular Transport Christopherson
Where are WE? Organism Tissue Cell Transport is fueled by the need of the cell to maintain homeostasis
Diffusion Movement of particles from an high concentration to a low concentration; reach homeostasis HighLow
What is concentration? The amount of a substance High concentration means there is a lot present
Substances that can diffuse across the cell membrane
Osmosis Movement of WATER from a high to a low concentration
Hint: a. Water will ALWAYS move to the higher concentration of dissolved substances.
Hint: b. Solute SUCKS solvent (water)!!!! Solute Water
Isotonic Solution Cell remains same size Water moves in and out at same rate (time) The concentration of dissolved substances is equal in and out of cell.
Hypotonic Solution Cell swells Water moves in The higher concentration of dissolved substances is __________ the cell.
Hypertonic Solution Cell shrinks Water moves out The higher concentration of dissolved substances is __________ the cell.
Two types of transport in cells Passive Transport : Movement of particles from a high to a low concentration
Two types of transport in cells Active Transport : Movement of particles from a low to a high concentration; ATP is needed ATP LOWHIGH