Photosynthesis
Download
1 / 24

Photosynthesis - PowerPoint PPT Presentation


  • 76 Views
  • Uploaded on

Photosynthesis. 8.1 & 8.2 Notes. Chemical Energy and ATP. Energy is the ability to do work. Your cells are busy using energy to build new molecules, contract muscles, and carry out active transport. Without the ability to obtain and use energy, life would cease to exist.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Photosynthesis' - cadee


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Photosynthesis

Photosynthesis

8.1 & 8.2 Notes


Chemical energy and atp
Chemical Energy and ATP

  • Energy is the ability to do work.

  • Your cells are busy using energy to build new molecules, contract muscles, and carry out active transport.

  • Without the ability to obtain and use energy, life would cease to exist.


Chemical energy and atp1
Chemical Energy and ATP

  • @One of the most important compounds that cells use to store and release energy is ATP (adenosine triphosphate ).@

  • ATP consists of adenine, a 5-carbon sugar called ribose, and three phosphate groups.


Storing energy
Storing Energy

  • Adenosine diphosphate (ADP) looks almost like ATP, except that it has two phosphate groups instead of three.

  • ADP contains some energy, but not as much as ATP..


Using biochemical energy
Using Biochemical Energy

  • One way cells use the energy provided by ATP is to carry out active transport.

  • Energy from ATP powers the synthesis of proteins and responses to chemical signals at the cell surface.


Heterotrophs and autotrophs
Heterotrophs and Autotrophs

  • Organisms that obtain food by consuming other living things are known as heterotrophs.

  • Some heterotrophs get their food by eating plants.

  • Other heterotrophs, such as this cheetah, obtain food from plants indirectly by feeding on plant-eating animals.


Heterotrophs and autotrophs1
Heterotrophs and Autotrophs

  • Organisms that make their own food are called autotrophs. (Plants, algae, and some bacteria)

  • The process by which autotrophs use the energy of sunlight to produce high-energy carbohydrates that can be used for food is known as photosynthesis.


Why is photosynthesis important
Why is Photosynthesis important?

  • Makes organic molecules (glucose) out of inorganic materials (carbon dioxide and water).

  • It begins all food chains/webs. Thus all life is supported by this process.

  • It also makes oxygen gas!!


Photosynthesis

Photosynthesis-starts to ecological food webs!


Photosynthesis

Photo-synthesis

means"putting together with light."

  • @Plants use sunlight to turn water and carbon dioxide into glucose.@ Glucose is a kind of sugar.

  • Plants use glucose as food for energy and as a building block for growing.

  • Autotrophs make glucose and heterotrophs are consumers of it.


Photosynthesis1

As can be seen from the equation for photosynthesis, the wood, bark, and root came from water and carbon dioxide.

Photosynthesis

Carbon dioxide + water glucose + oxygen

sunlight

absorbed by chlorophyll

@6CO2+ 6H2O + energy  C6H12O6+ 6O2@


Plants in action
Plants in Action wood, bark, and root came from

Check it!

What is the process that uses the sun’s energy to make simple sugars?



Pigments
Pigments spectrum (all forms of light).

  • Plants gather the sun’s energy with light-absorbing molecules called pigments.

  • @The plants’ principal pigment is chlorophyll.@


Pigments1
Pigments spectrum (all forms of light).

  • @Leaves reflect green light, which is why plants look green.@

  • Plants also contain red and orange pigments such as carotene that absorb light in other regions of the spectrum.


Chloroplasts
Chloroplasts spectrum (all forms of light).

  • Photosynthesis takes place inside organelles called chloroplasts.

  • Chloroplasts contain saclike photosynthetic membranes called thylakoids


Chloroplasts1
Chloroplasts spectrum (all forms of light).

  • Pigments are located in the thylakoid membranes.

  • The fluid portion outside of the thylakoids is known as the stroma.


Photosynthesis
Stomata spectrum (all forms of light).This opening how plants exchange gases!Check it! Can you name the two important gases that go in and out of the leaves?


Light dependent reactions
Light-Dependent Reactions spectrum (all forms of light).

  • @The light-dependent reactions use energy from sunlight to produce energy@ (ATP and NADPH.)

  • These reactions take place within the thylakoid membranes of the chloroplast.


Light independent reactions
Light-Independent Reactions spectrum (all forms of light).

  • @No light is required to power the light-independent reactions.@

  • The light-independent reactions take place outside the thylakoids, in the stroma.


What is the main compound used for energy
What is the main compound used for energy? spectrum (all forms of light).

  • ATP (Adenosine Triphosphate)


What is the general formula for photosynthesis
What is the general formula for photosynthesis? spectrum (all forms of light).

  • Water + CO2 + Sunlight - Glucose + O2

  • 6CO2 + 6H2O + energy  C6H12O6+ 6O2


What two reactions make up photosynthesis
What two reactions make up photosynthesis? spectrum (all forms of light).

  • Light-dependent reactions

  • Light-independent reactions