Alternative Pathways in Photosynthesis. Figure 10.20 A review of photosynthesis.

Slides:



Advertisements
Similar presentations
Photosynthesis Quest Number 3 Monkemeier CP Biology 2011.
Advertisements

Photosynthetic Pathways C3 Photosynthesis:  Used by most plants and algae.  CO 2 + ribulose bisphosphate (5 carbon sugar) = phosphoglyceric acid (3 carbon.
 Allow for the entry of CO 2 and exit of water vapor (transpiration).  On sunny, hot, dry days, guard cells close to preserve water, but this poses.
Photorespiration AP BIO. Review Stomates need to be OPEN for gas exchange to occur in the leaf However, open stomates can lead to dehydration due to transpiration.
Photorespiration When weather is hot and dry, guard cells decrease the size of stomata, also decreasing the concentration of carbon dioxide. Oxygen (O2)
Special Adaptations of C 4 and CAM Plants (Unit 7.12) James Michael Shefali.
The Calvin Cycle & Alternative Carbon fixers
Photosynthesis C3, C4, CAM plants.
Calvin Cycle and Photorespiration. Calvin Cycle Where does the Calvin Cycle occur? In the stroma What goes into the Calvin Cycle? ATP, NADPH, Carbon Dioxide.
Alternate Mechanisms of Carbon Fixation Also Known As… Why can’t they just leave good enough alone. Let’s cut them all down.
PHOTOSYNTHESIS Variations on a Theme WHAT DO PLANTS NEED? Photosynthesis Light reactions Light H 2 O Calvin cycle CO 2 O O C  sun  ground  air What.
Organisms capture and store free energy for use in biological processes Calvin Cycle.
Alternative Methods of Carbon Fixation Photorespiration & C 3 Plants Photorespiration & C 3 Plants C 4 Photosynthesis & Plants C 4 Photosynthesis & Plants.
Carbon enters the cycle in the form of CO 2 and leaves in the form of sugar (C 6 H 12 O 6 ) ATP and NADPH are consumed.
AP Biology Photosynthesis: Variations on the Theme.
Photosynthesis. Review the following terms:  Autotrophs and heterotrophs  The structure of chloroplasts and cell membrane  Electron transport chain.
PHOTOSYNTHESIS Chapter 10. BASIC VOCABULARY Autotrophs – producers; make their own “food” Heterotrophs – consumers; cannot make own food.
Absorption of water and minerals Water and minerals enter the plant through the epidermis of the root, through the cortex, and into the stele (vascular.
The Dark Reaction - - light-independent - - energy stored in ATP and NADPH (from light reaction) is used to reduce CO 2 to sugar.
MODULE 7: Photosynthesis Module 7: Photosynthesis.
Photosynthesis Part II. Step 2 - Light-Independent Reactions Glucose.
Photosynthesis. Review the following terms:  Autotrophs and heterotrophs  The structure of chloroplasts and cell membrane  Electron transport chain.
Chapter 6 Section 6.2.
6-2: Calvin Cycle. What comes next?  In the second set of reactions of photosynthesis, plants use the energy that was stored in ATP and NADPH during.
AP Biology Photosynthesis: Variations on the Theme.
AP Biology Photosynthesis: Variations on the Theme.
Other Types of Photosynthesis C 4 Photosynthesis and CAM Photosynthesis.
Calvin Cycle Uses ATP and NADPH to convert CO 2 to glucose or other sugars  Glyceraldehyde-3-phosphate is final product of Calvin cycle  G3P can easily.
LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert.
Photosynthesis, Environment & Adaptation C3 vs. C4 vs. CAM Photosynthesis.
Photosynthetic Adaptations and Fermentation Mr. Rogers and Mr. Gil AP Biology January 12, 2010.
Photorespiration & Alternative Methods of Carbon Fixation.
Ch. 2 Photosynthesis (Ps) and Light
AP Biology Photosynthesis Part 3.
Gas Exchange in the Leaf of a Plant. Stomata Closed Open.
Photosynthesis. Carbon Cycle Light Light Spectrum.
Photosynthesis: A Recap 1 Based on this equation, how could the rate of photosynthesis be measured? The photosynthetic equation: light Excites electrons.
C4 Photosynthesis AP Biology Unit 4 Review: C3 Photosynthesis During “regular” photosynthesis, CO 2 is trapped into a 3-carbon compound by Rubisco 
 Determine how the plant utilizes the energy from the light dependent reactions to build sugars from CO 2.  Identify some common adaptations to this.
Photosynthesis Part 5 Page 118.
Ch 10 Calvin Cycle, Photorespiration, C3/C4/CAM plants.
Review Calvin Cycle begins with adding a CO2 to RuBP This reaction is catalyzed by the an enzyme. Can you name it?
Photorespiration: Stopping Photosynthesis Other types of Photosynthesis (besides C3) Pgs Objective: I can describe alternative mechanisms.
Photosynthesis Light + 6CO 2 + 6H 2 0 → C 6 H 12 O 6 + 6O 2 How does this relate to respiration?
Fig Light Reactions: Photosystem II Electron transport chain Photosystem I Electron transport chain CO 2 NADP + ADP P i + RuBP 3-Phosphoglycerate.
Calvin Cycle 2015 student ATP and NADPH power sugar synthesis in the Calvin cycle The Calvin cycle makes sugar in the stroma. The necessary ingredients.
School of Sciences, Lautoka Campus BIO509 Lecture 25: Photorespiration
Chapter 10: Photosynthesis
December 5, 2008 Objectives: - Discuss how different factors affect the rate of photosynthesis - Describe alternative pathways plants use to make sugars.
Rate of Photosynthesis in Response to Differing Percentages of Atmospheric Oxygen.
Photosynthesis Part 2 The Calvin Cycle.
Photosynthesis.
The Calvin Cycle Or the Dark Side of Photosynthesis II
Photosynthesis: Calvin Cycle
Alternative Methods of Carbon Fixation
Metabolic Processes: Photosynthesis II The Light-Independent Reactions
Alternatives in carbon fixation Page
Exceptions to Normal Photosynthesis
Chemiosmosis – making ATP
The Calvin Cycle Anabolic reaction (builds sugar)
AP Biology Photosynthesis Part 3.
Alternative Pathways & Photosynthesis Ms. Day AP Biology
AP Biology Photosynthesis Part 3.
You Try! With your group, draw the stages of Photosynthesis, adding as much detail as you can without consulting your notes/text.
AP Biology Photosynthesis Part 3.
Stage 2 – The Calvin Cycle
AP Biology Photosynthesis Part 3.
AP Biology Photosynthesis Part 3.
Alternative Methods of Carbon Fixation
8.1 and 8.2.
Presentation transcript:

Alternative Pathways in Photosynthesis

Figure A review of photosynthesis

“C 3 ” Plants

Guard cells Pore Stoma 18 µm Leaf surfaces contain stomata Photosynthesis relies on CO 2 entering the leaf and O 2 leaving the leaf

Leaf cross-section CO 2 Carbon dioxide diffuses into leaves through stomata H2OH2O BUT: water also escapes through the stomata

CO 2 stored in mesophyll cell CO 2 used in adjacent bundle sheath cell Organic acid Calvin cycle CO 2 G3P CO 2 C 4 plants sequester CO 2 in certain cells C 4 pathway Examples of C 4 plants: corn, sugarcane, many grasses

Figure C 4 leaf anatomy and the C 4 pathway

C 4 Plants

CO 2 used during the day CO 2 stored at night CO 2 G3P Calvin cycle Organic acid CAM plants sequester CO 2 at night C 4 pathway Examples of CAM plants: pineapples, cacti, and most succulents.

CAM Plants Welwitschia

Figure C 4 and CAM photosynthesis compared

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.