1 / 84

September 16, 2016

September 16, 2016. Agenda : Pass back & review papers Review Ch 2 Notes Demo. Do Now: Please put your homework on your desk. Nearpod. Why talk about chemistry?.

rachelt
Download Presentation

September 16, 2016

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. September 16, 2016 Agenda: • Pass back & review papers • Review Ch 2 Notes • Demo Do Now: Please put your homework on your desk. Nearpod

  2. Why talk about chemistry? You normally think about biology as being the study of squirrel guts and other not-very-useful things. However, nowadays, biology uses a great deal of chemistry to understand how biological processes work.

  3. What is an atom?

  4. Labeling the parts of an atom:

  5. What is an element? Four key elements to life? (Five)

  6. Taking a closer look… • Elements are different because they each have a different number of protons

  7. Compounds vs. Molecules

  8. What is an ion? • Electrons not equal to the number of protons • There is a charge

  9. Ionic and covalent bonds Share electrons Transfer electrons

  10. Check for Understanding… Decide whether the following are examples of elements, ions, molecules, or compounds. • Na+ • NaCl • K (Potassium) • 02 • 03 • CO2 • H20

  11. Chemical reactions: atoms bond or change bonding partners What is the reactant? What is the product?

  12. Name the reactants and products of photosynthesis.

  13. Equilibrium • Is the state in which both reactants and products are present in concentrations which have no further tendency to change with time

  14. THIS IS KEY!! In all chemical reactions, matter and energy are neither created or destroyed. Energy: capacity to do work, or the capacity for change. Energy usually changes form during chemical reactions. Energy can be released or absorbed

  15. Activation Energy • The amount of energy needed to start a chemical reaction

  16. Is Energy being released or absorbed? 1. 2.

  17. Exothermic Endothermic Exo = Exit Endo = In

  18. Chapter ONE Review Question: BONUS QUESTION: The sum of all the chemical reactions in your body is known as….

  19. Add these next few slides to your Ch 2 Notes….

  20. WHAT IS ENERGY????? ATP (adenosine triphosphate) captures and transfers free energy. This is the fuel source for living things. Our main energy molecule.

  21. ATP MOLECULE Together these are called “Adenosine” This molecule is the reason you eat.. move… groove…. And sleep!

  22. ATP – P = ADP ADP + P = ATP Release Energy Store Energy

  23. It Matters Ionized state of matter, very hot

  24. Demo

  25. September 19, 20162.5 What is an enzyme? Nearpod

  26. What is an enzyme?

  27. ENZYMES = CATALYSTS • Enzymes LOWER the energy barrier. • Enzymes DECREASE the amount of activation energy needed so chemical reactions can take place.

  28. Review Catalysts or enzymes speed up the rate of a reaction. The catalyst or enzyme is not used up or changed by the reactions. Most biological catalysts are enzymes (proteins) that act as a framework (or location) in which reactions can take place. Bagel in Bagel Cutter

  29. Review Enzymes lower the energy barrier so chemical reactions can proceed.

  30. Figure 6.9 Enzyme and Substrate Biological catalysts (enzymes) are highly specific. Reactants are called substrates. Substrate molecules bind to the active site of the enzyme. E + S → ES → E + P Lock and Key Model

  31. Denature • Enzymes have optimal temperatures, salinity and pH. • If its not the right environment - the enzyme (which is a protein) will denature (unravel) and no longer work properly. • Examples: Pepsin: Protease (Stomach) – pH of 2 Amylase: (Mouth) – pH of 6

  32. Review • Can any enzyme work with any substrate? • Which of the following is an example of an enzyme? • Enzymes work best under specific conditions such as • Enzymes are a type of • If you keep adding more substrate to an enzyme reaction, • If you keep adding more enzymes to reaction,

  33. Enzyme Graphs Substrate Concentration Enzyme Concentration

  34. WHAT ARE WE DOING NOW?! Enzyme Packet

  35. September 20, 2016 Agenda: • Simple Enzymes Lab Wednesday QUIZ on Enzymes and Chemical Reactions. Homework: Read Ch 2 and look over notes. Active Reading Worksheet. Warm-Up and Review: 3. 1. 2.

  36. Question and Answer ATP is called…. A. Adenosine triphosphate B. Adenosine diphosophate C. Adenine tropophate D. Adenine dipate

  37. Question and Answer The purpose of ATP is to… A. Look good B. Capture and transfer free energy C. Bond and remove waste products D. Give us oxygen

  38. Question and Answer ADP is considered…. A. A fully charged battery B. A molecule that gives off free energy C. A partially charged battery D. A molecule with four phosphate bonds

  39. Glucose Test Strips Write Color and Number!

  40. 9/21/16 Do Now: Please complete the enzyme active reading worksheet. Biology Agenda: • Go over pH and Enzyme Pkt • Review yesterday’s enzyme lab • Enzyme and ChemRxn Quiz

  41. Put pH Notes on a new sheet of paper. Save room to add to them tomorrow.

  42. pH Scale

More Related