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Cell processes:. Plasma Membrane Transport of Molecules Energy Conversion Protein Synthesis. Homeostasis. Balance internal conditions of cells Maintain “Equilibrium ” Plasma Membrane controls what enters & leaves cell. Plasma Membrane functions:. Protective Barrier
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Cell processes: Plasma Membrane Transport of Molecules Energy Conversion Protein Synthesis
Homeostasis • Balance internal conditions of cells • Maintain “Equilibrium” • Plasma Membrane controls what enters & leaves cell. Plasma Membrane functions: • Protective Barrier • “Selectively/Semi Permeable”: Decides what to let in/out
Structure of Plasma Membrane • Lipids: structural component- phospholipid bilayer • Proteins: structural support, communication, transport (channel or carrier) • Carbohydrate: communication, cell recognition
Passive vs active transport • What’s the biggest difference between the two?
Solutions that affect osmosis in cells • Isotonic: equal concentration of substances Cell stays same • Hyptotonic: less solutes than inside cell Cell swells • Hypertonic: more solutes than inside cell Cell Shrinks
Energy Conversions Cellular Respiration in the mitochondria breaks down sugars to release energy in the form of ATP for cells to use. During Photosynthesis energy from the sun is converted to sugars (glucose C6H12O6) in the chloroplast. Photosynthesis Vs. Cellular respiration
Energy is stored in Bonds ATP • Cells CANNOT use glucose…it must first be converted to Adenosine Triphosphate:
DNARNAPROTEIN • Double-strand “helix” Single-strand • Deoxyribose sugar Ribose sugar • C/G & A-T Uracil instead of thymine • Stays in nucleus Leaves nucleus Both made up of nucleotides Made up of amino acids Both carry genetic code Expressed as traits
Can You recall?? What chemical bond in ATP releases energy when broken? A) phosphate B) sulfur C) oxygen D) potassium
Can You recall?? What chemical bond in ATP releases energy when broken? A) phosphate B) sulfur C) oxygen D) potassium
CAN you recall?? • Name the three types of passive transport
Can You Recall?? Hypotonic Hypertonic Isotonic
Which of the following diagrams accurately represents the use of gases in both cellular respiration and photosynthesis? A) B) C) D)
Which of the following diagrams accurately represents the use of gases in both cellular respiration and photosynthesis? A) B) C) D)