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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/∆tChange is final-initial 130-60/30-1870/12=5.8
Quiz #21 on Friday Photosynthesis Tutoring available
Study hour log due 2/27 (Friday)
2/24 Class Business Pg. 93 Photosynthesis
Assessment Average Top Scorer
Quiz #20 .77 Gianni (2.5) and John (3.0)
Quiz #19 1.10 Gianni (2.9)
Quiz #18 .58 Gianni (2.5)
Quiz #17 .58 Gianni (2.5)
Unit Test #7 Genetics
1.11 Daquine (3.0) and John (3.6)
Grade check in
** Grade danger**Bristin, Annie, and Travia
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
Review Cellular Respiration
Electron shuttlesspan membrane
CYTOSOL 2 NADH
2 FADH2
2 NADH 6 NADH 2 FADH22 NADH
Glycolysis
Glucose2
Pyruvate
2AcetylCoA
Citricacidcycle
Oxidativephosphorylation:electron transport
andchemiosmosis
MITOCHONDRION
by substrate-levelphosphorylation
by substrate-levelphosphorylation
by oxidative phosphorylation, dependingon which shuttle transports electronsfrom NADH in cytosol
Maximum per glucose:About
36 or 38 ATP
+ 2 ATP + 2 ATP + about 32 or 34 ATP
or
Figure 9.16
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
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 1st Law of Thermodynamics,
which says…
light
Key Point #1: What is an autotroph?
Key Point #2: What is an organic compound?
Photosynthesis & Ecology The energy captured through photosynthesis
forms the basis of the ecological pyramid.
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• 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.
Leaves: The Photosynthetic Organs of Plants
Key Point #3: Leaves perform most of the photosynthesis in plants.
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cuticle
upper epidermis
palisade mesophyll
Bundle-sheath cells
stoma
lower epidermis
spongy mesophyll
Xylem & phloem
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?
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
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
Quiz #21 on Friday Photosynthesis Tutoring available
Study hour log due 2/27 (Friday)
2/25 Class Business Pg. 93 Photosynthesis
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
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.
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)
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6 CO2 + 6 H2O C6H12O6 + 6 O2light
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
If PS is a redox reaction, then where do the electrons come from?
Scientists previously believed that the oxygen released from photosynthesis came from CO2. 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.
Photosynthesis: An Overview
• Follow the energy in photosynthesis,
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light
light ATPNADPH
Light Reactions
thylakoids
Calvin Cycle
stroma
Organic compounds
(carbs)
Granum
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