08 Photosynthesis Presentation
22-Feb-20
Photosynthesis
Lecture 08
1
Objectives
At the end of this series of lectures, you should be able to:
Define terms. Describe the structure of chloroplasts and their location
in a leaf. Compare the reactants and products of the light
reactions and the Calvin cycle.
2
1
22-Feb-20
Objectives
Explain how the electron transport chain and chemiosmosis generate ATP, NADPH, and oxygen in the light reactions.
Compare the mechanisms that C3, C4, and CAM plants use to obtain and use carbon dioxide.
3
Trophic Levels
Autotrophs
Primary producers Photoautotrophs
Heterotrophs
4
2
22-Feb-20
Diversity of Photosynthesis
Plants Protists (protozoa) Bacteria
Kelp
5
Chloroplasts
Chloroplasts are located in green parts of plants.
The green color comes from the pigment chlorophyll located in the chloroplasts. Important role in converting light to chemical energy.
Leaves are the major site of photosynthesis and contain large numbers of chloroplasts in each cell. Within a leaf, the chloroplasts are concentrated in the mesophyll Stomata allow CO2 to enter the leaf and O2 to exit the leaf.
6
3
22-Feb-20
Biology by OpenStax College is licensed under a Creative Commons Attribution 3.0
7
Chloroplasts
Chloroplasts have a double membrane. Stroma is a thick fluid that fills the inner membrane Thylakoids are a system of interconnected
membranous sacs
Stack of thylakoids are called granum (grana) Thylakoid membranes are the location of much of
photosynthesis. Chlorophyll is built into the thylakoid membrane. 8
4
22-Feb-20
Miguelsierra, CC BY-SA 3.0,
9
6CO 12H O Light C H O 6O 6H O C H O 6O 6CO 6H O 32 ATP Heat
10
5
Redox Reactions
Cellular respiration uses redox reactions to harvest the chemical energy stored in a glucose molecule. Glucose is oxidized and O2 is reduced to H2O. Electrons lose potential as they travel down the electron transport chain.
In photosynthesis, Water is oxidized and CO2 is reduced. Light is captured by chlorophyll molecules to boost the energy of electrons. Chemical energy is stored in the chemical bonds of sugars.
11
Photosynthetic Reactions
Light reactions
Occur on the thylakoids Convert light energy to high energy intermediates (ATP
and NADPH). Produces O2
12
22-Feb-20 6
22-Feb-20
Photosynthetic Reactions
Calvin Cycle
Occurs in the stroma Uses high energy intermediates and CO2 to synthesize
glucose. Carbon fixation
Light Reactions and Calvin Cycle are linked by the high energy intermediates.
13
Daniel Mayer, CC BY-SA 3.0,
14
7
22-Feb-20
Light
Light is a small part of the electromagnetic spectrum.
Wavelengths: 380-750 nm Photon ? packet of light energy
Shorter the wavelength the more energy the photon has
15
Philip Ronan, Gringer, CC BY 3.0,
16
8
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- photosynthesis
- ap biology 2005 2006
- 08 photosynthesis presentation
- biology pasco scientific
- urry 1 66 50 1 minorsky 5
- photosynthesis and cellular respiration brown biology
- cell energy photosynthesis respiration
- chapter 10 photosynthesis the calvin cycle life from air
- lecture 022 photosynthesis 1 light reactions
Related searches
- fun presentation topics
- interesting presentation topics
- interesting 5 minute presentation topics
- presentation of mi in women
- 10 minute presentation topics
- fun presentation ideas
- fun presentation topics for work
- funny presentation topics
- good presentation topics
- 5 minute presentation topics
- powerpoint presentation topic ideas
- topics for presentation for kids