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Cellular Energy StAIR

Cellular Energy StAIR. Chapter 6&7 Photosynthesis and Cellular Respiration. All of the images present come directly from your textbook, Modern Biology by Holt, Reinhart and Winston. In your notes write the page number where the graphic is located. Obtaining Energy.

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Cellular Energy StAIR

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  1. Cellular Energy StAIR Chapter 6&7 Photosynthesis and Cellular Respiration

  2. All of the images present come directly from your textbook, Modern Biology by Holt, Reinhart and Winston. • In your notes write the page number where the graphic is located.

  3. Obtaining Energy • ATP, adenosine triphosphate is the energy source used by all living things. • ATP provides the energy required for cellular activities like: • muscle contraction • protein synthesis • active transport

  4. Obtaining Energy • Autotrophs use energy from sunlight or from chemical bonds in inorganic substances to make organic compounds • Animals and other organisms that must get energy from food instead of directly from sunlight or inorganic substances are called heterotrophs.

  5. Organisms that produce their own food are categorized how? • Heterotrophs • Autotrophs • Chemotrophs • Multitrophs

  6. Correct!!! You have done a good job paying attention to the material. To move on the the next section click on the play button at the bottom.

  7. Try Again. This time read through the questions and answers more carefully.

  8. Organisms that eat their food to obtain energy are called___________ • Heterotrophs • Autotrophs • Chemotrophs • Multitrophs

  9. Exactly!!! Keep up the good work! Move on to the next section.

  10. Close…but no cigar. Think about it. Use any clues you can remember to answer the question correctly.

  11. What is Photosynthesis? (PSN) • The prefix “photo” means light • The word “synthesis” means to make

  12. What does photosynthesis literally mean? • To make light • Light making ability • To make with light • Make plants green

  13. Awesome!!! You are so smart. Keep the good work going right on into the next portion.

  14. Awe Shucks! Not quite. Maybe you rushed yourself. This time take your time and think it over.

  15. Required Materials for Photosynthesis • light energy • inorganic materials • pigments • energy storage compound

  16. Light energy • The light energy from sunlight is absorbed by pigments found in plant cells.

  17. Inorganic materials • CO2 (carbon dioxide) is the source of carbon and oxygen for making glucose • H2O (water) is the source of hydrogen for making glucose and the oxygen given off as a byproduct

  18. Pigments • Plant pigments absorb sunlight • Chlorophyll a absorbs indigo and red lights • Chlorophyll b absorbs blue and orange-red light • Chlorophyll c absorbs small amounts of blue and orange light.

  19. Pigments • Chlorophyll is located in the plant organelle called a chloroplast

  20. Energy Storage Compound • ATP, adenosine triphosphate, provides the cells with the energy it requires to make glucose through PSN

  21. Which of the following is NOT needed for PSN? • Water • Sunlight • Energy Storage compound • Soil

  22. Correct!!! You have done a good job paying attention to the material. To move on the the next section click on the play button at the bottom.

  23. Awe Shucks! Not quite. Maybe you rushed yourself. This time take your time and think it over.

  24. Overview of PSN • Light energy from the sun is trapped by the chloroplasts and converted into a stored chemical energy (glucose) that can be used by living cells.

  25. Overview of PSN • Each chloroplast consists of a double membrane enclosing stacks of green disc like structures called thylakoids.

  26. Overview of PSN • Stacks of thylakoids make up grana • The thylakoids are surrounded by a dense fluid called the stroma

  27. What are the three parts to a chloroplast? • Grandma, thiel, sloma • Grana, stacks, stomata • Grana, thylakoids, stroma • Grains, thylakoids, sloma

  28. Exactly!!! Keep up the good work! Move on to the next section.

  29. Close…but no cigar. Think about it. Use any clues you can remember to answer the question correctly.

  30. Overview of PSN • Photosynthesis can be divided into two stages: Light Reactions and Calvin Cycle • In the light reactions, light energy is converted to chemical energy, which is temporarily stored in ATP and the energy carrier molecule NADPH. • In the Calvin Cycle, organic compounds are formed using CO2 and the chemical energy stored in ATP and NADPH.

  31. Light Reactions • Occur in the thylakoid membranes of the chloroplasts only when sunlight is present

  32. Where do the light reactions occur? • Thylakoid membranes • Stroma • Grana • Stroma membranes

  33. Awesome!!! You are so smart. Keep the good work going right on into the next portion.

  34. Awe Shucks! Not quite. Maybe you rushed yourself. This time take your time and think it over.

  35. Light Reactions • Light energy is captured • 2 molecules of water are split into 4 H+ (hydrogen ions) and O2 (a molecule of oxygen gas)

  36. Light Reactions • NADP (a hydrogen acceptor) bonds with the H+ ions to form NADPH (an energy storage compound) that is used in the dark reactions

  37. A molecule of ______ is split and _________ is released in the light reactions. • Oxygen, water • Glucose, Carbon dioxide • Water, oxygen • Carbon dioxide, glucose

  38. Awesome!!! You are so smart. Keep the good work going right on into the next portion.

  39. Try Again. This time read through the questions and answers more carefully.

  40. Dark Reactions • The reactions that DO NOT require light but can take place in the light • ATP and NADPH produced by the light reactions are used to change carbon dioxide to sugar • Also called the Calvin cycle

  41. Dark Reactions • In the Calvin cycle, CO2 is incorporated into organic compounds, a process called carbon fixation.

  42. The products from the ___________ are used later in the _________. • Calvin cycle, dark • Dark, light • Light, dark • Calvin cycle, light

  43. Correct!!! You have done a good job paying attention to the material. To move on the the next section click on the play button at the bottom.

  44. Awe Shucks! Not quite. Maybe you rushed yourself. This time take your time and think it over.

  45. Dark Reactions • CO2 combines with RuBP (a 5 carbon sugar) to form an unstable 6 carbon molecule • RuBP+CO2 compound breaks apart to form 2 molecules of PGA (3 carbon mol.)

  46. Dark Reactions • PGA combines with the hydrogen which is taken from the NADPH from the light reactions and forms G3P (3 carbon molecule) • G3P can be used as a nutrient or combined to make glucose or RUBP

  47. What is produced from the Calvin cycle? • Glucose • RuBP • G3P • PGA

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