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 Part I:Overview

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.

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.

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

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)

20

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,

23

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