1. 2/24 Daily Catalyst Pg. 83 Photosynthesis  1. Write the equation for cellular respiration on the bright colored paper.  2. Calculate the bacterial growth rate from hour 18 to hour 30.

2. 2/24 Daily Catalyst Pg. 93 Photosynthesis  1. Write the equation for cellular respiration. 2. Calculate the bacterial growth rate from hour 18 to hour 30. ∆y/∆t Change is final-initial 130-60/30-18 70/12 =5.8 2

3.  Quiz #21 on Friday  Photosynthesis  Tutoring available  Study hour log due 2/27 (Friday) 2/24 Class Business Pg. 93 Photosynthesis

4. AssessmentAverageTop Scorer Quiz #20.77Gianni (2.5) and John (3.0) Quiz #191.10Gianni (2.9) Quiz #18.58Gianni (2.5) Quiz #17.58Gianni (2.5) Unit Test #7 Genetics1.11Daquine (3.0) and John (3.6) Grade check in ** Grade danger** Bristin, Annie, and Travia

5.  Daily Catalyst  Class Business  Review cellular respiration  CR essay prompt  Introduction to photosynthesis notes  Homework: read AND outline 10.2 2/24 Agenda Pg. 93 Photosynthesis

6.  Review Cellular Respiration Electron shuttles span membrane CYTOSOL 2 NADH 2 FADH 2 2 NADH 6 NADH 2 FADH 2 2 NADH Glycolysis Glucose 2 Pyruvate 2 Acetyl CoA Citric acid cycle Oxidative phosphorylation: electron transport and chemiosmosis MITOCHONDRION by substrate-level phosphorylation by substrate-level phosphorylation by oxidative phosphorylation, depending on which shuttle transports electrons from NADH in cytosol Maximum per glucose: About 36 or 38 ATP + 2 ATP + about 32 or 34 ATP or Figure 9.16

7.  1. The element carbon is contained in all organic compounds. Discuss the role of cellular respiration in carbon cycling in the biosphere. I am expecting at least 5 complete sentences!  Time: 6 minutes  Noise: 0 (silence) In-class Essay

9. Photosynthesis Part I: Overview

10. Photosynthesis: The BIG Picture  Photosynthesis is the process by which PHOTOAUTOTROPHS convert the energy in SUNLIGHT into the energy stored in ORGANIC COMPOUNDS. 10 Don’t forget the 1 st Law of Thermodynamics, which says… light Key Point #1: What is an autotroph? Key Point #2: What is an organic compound?

11. Photosynthesis & Ecology  The energy captured through photosynthesis forms the basis of the ecological pyramid. 11 The biomass that is generated by producers supports nearly all the living organisms on the planet. Autotrophs capture energy and “fix” it into organic compounds; heterotrophs consume compounds produced by other organisms to obtain energy.

12. Leaves: The Photosynthetic Organs of Plants  Key Point #3: Leaves perform most of the photosynthesis in plants. 12 cuticle upper epidermis palisade mesophyll Bundle- sheath cells stoma lower epidermis spongy mesophyll Xylem & phloem

13. Leaves: The Photosynthetic Organs of Plants  Leaves have a LOT of surface area to facilitate absorption of sunlight. 13 Are there any drawbacks to leaves having a large amount of surface area?

14.  1. Provide an example of an organic compound.  2. How is the large surface area of leaves potentially detrimental?  3. How do the reactant molecules of photosynthesis reach the chloroplast in leaves? 2/25 Daily Catalyst Pg. 83 Photosynthesis

15.  1. Provide an example of an organic compound.  Carbohydrates, fats, proteins, and nucleic acids  2. How is the large surface area of leaves potentially detrimental?  The large surface area can led to intense transpiration from the leaf causing dryness.  3. How do the reactant molecules of photosynthesis reach the chloroplast in leaves?  Through the stomata (plural) 2/25 Daily Catalyst Pg. 83 Photosynthesis

16.  Quiz #21 on Friday  Photosynthesis  Tutoring available  Study hour log due 2/27 (Friday) 2/25 Class Business Pg. 93 Photosynthesis

17.  Daily Catalyst  Class Business  Finish Introduction to photosynthesis notes  The light reaction notes  Homework: read AND outline 10.3 on Page 85 in your notebook 2/25 Agenda Pg. 83 Photosynthesis

18. Granum Chloroplast Structure: A Review  Key Point #4: In eukaryotes, photosynthesis takes place inside chloroplasts (mesophyll)  Chloroplasts have 3 membranes: Outer membrane Inner membrane Thylakoid membrane, folded to form thylakoids Thylakoids are arranged in stacks called grana. Key Point #5: Chlorophyll and other pigments are embedded in the thylakoid membrane.

20. Photosynthesis: An Overview  Key Point #6: The PS equation:  Photosynthesis occurs in 2 “stages”: 1.The Light Reactions (or Light-Dependent Reactions) 2.The Calvin Cycle (Dark Reactions or Light-Independent Reactions) 20 6 CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2 light Is photosynthesis an ENDERGONIC or EXERGONIC reaction?

21. Compare Cellular Respiration and Photosynthesis  Both reactions require the movement of electrons (redox reactions)  Cellular Respiration is exergonic  Energy is EXITing  Key Point #7: Photosynthesis is ENDERGONIC  Energy is ENTERING  Energy source?  Sunlight 21

22. If PS is a redox reaction, then where do the electrons come from?  Scientists previously believed that the oxygen released from photosynthesis came from CO 2. NOT TRUE!  Oxygen released by plants actually comes from WATER!  Key Point #8: The SPLITTING OF WATER IS THE SOURCE OF ELECTRONS (from hydrogen) AND OXYGEN IS RELEASED AS A PRODUCT.

23. Photosynthesis: An Overview Follow the energy in photosynthesis, 23 light ATP NADPH Light Reactions thylakoids Calvin Cycle stroma Organic compounds (carbs) Granum

24.  Directions: Take 3 minutes to answer your provided question. With your two other classmates. Discuss the responses to the questions.  Time: 3 minutes to read/answer and 10 minutes to share  Noise: 1 (with partners) Work Time