Photosynthesis & Respiration

Pre- Assessment

1. What types of living things carry out photosynthesis?

2. In which cell structure does photosynthesis occur?

Pre-assessment continued

3. What are the substrates for photosynthesis?

4. What are the products of photosynthesis?

Continued…5. What does the term respiration

make you think of?

6. In which cell structure does cellular respiration occur?

Wait there’s more…

7. What types of living things carry out cellular respiration?

8. What are the substrates for cellular respiration?

Food for thought…

What goes in?What comes out?

Where does the matter in the tree come from?

Where does the cow get energy?

What goes in?

What comes out?

The cow, you (animals) and plants get it from Glucose : a simple sugar that is a type of carbohydrate• Other Simple Sugars are:Fructose (fruit sugar) Sucrose/tablesugar=glucose+ fructose

Glucose C6H12O6 : type of carbohydrate called a simple sugar

• Do you see six carbon atoms?• Can you describe the shape?

Other Carbohydrates:

• Complex carbohydrates:• Starch: in bread/pasta Cellulose: in plant cell walls

Carbohydrate functions:

• Sugars and starches provide short-term energy storage…

• Cellulose provides structure in plants.

Complex Carbohydrates are polymers…

Polysaccharides: • How do carbohydrate polymers form?

• Water is removed from the 2 molecules by an enzyme to form a covalent bond!

Why do we care about Photosynthesis?

it is the MOST important chemical reaction on our planet!

The equation for the chemical reaction of photosynthesis is:

Sunlight (ENERGY!)

6CO2+6H2O C6H12O6 + 6O2 Glucose!(Reactants/ (Products) Substrates)

• Why do we need 6CO2 +6H2O rather than CO and H2O?• To balance the Equation!

• Photosynthesis is a Synthesis reaction BECAUSE it builds a 6 carbon molecule (glucose) from single carbon molecules.

Describe Photosynthesis:

-Process that transforms light energy to chemical energy

-The chemical energy is stored in sugar (GLUCOSE)

-Occurs in plants, algae & some bacteria

Describe Photosynthesis, cont.

-Takes place in chloroplasts using chlorophyll, the green pigment in plants

-Chlorophyll uses light energy to drive the reaction

What happens during photosynthesis?

Plants capture light energy and use it to convert CO2 and H2O to glucose (C6H12O6) and oxygen (O2)

Glucose is stored, but Oxygen is released into the air

Photosynthesis, cont.

The glucose is moved from the leaves to the roots, stems and fruits of the plants

Some of the sugar is used by the plant for energy

Some is stored as starch and/or built into plant tissue

The RESULT of Photosynthesis!

The energy that was in sunlight was transformed (changed) into chemical energy (now in glucose) by photosynthesis!!

CO2 has been converted to MATTER that we can use as a source of Carbon!

Where is the energy stored in the Glucose molecule (C6H12O6)?

• In the BONDS between the Atoms

Why is this important to us?

Reason 1: We cannot make our own food; we

must get it from plants.

Plants are the first step in the food chain.

Why is this important to us?

Reason 2:

The oxygen released during photosynthesis is necessary for all living things.

What is Cellular Respiration?

What is Cellular Respiration?

A chemical reaction that involves the breakdown of glucose molecules to release energy and transform it into ATP, the “gasoline” for our cells!

Where does it take place? Respiration?

It takes place in the mitochondria of both plant and animal cells (ALL living things!)

A multi-step process

What are the Substrates & Products of the Reaction?

• Requires Glucose & Oxygen as substrates (substances we take in)!

• Produces Carbon Dioxide & Water (the things we breathe out!) as products.

What is the chemical equation for cellular respiration?

Glucose Oxygen

C6H12O6+ 6O2 6CO2+6H2O + 38 ATP

Video: Photosynthesis and Cellular Respiration

http://www.teachertube.com/viewVideo.php?title=Cellular_Respiration_and_Photosynthesis&video_id=159339

Photosynthesis Respiration

Where does it occur?(organelle)

Why is it important?

What is the Substrate?

Products?

What is the formula?Who does it?(Plant, Animal)

Your assignment – CHOOSE ONE!(30 points) CREATE A

CROSSWORD PUZZLE (12 terms)• COMPARE / CONTRAST POSTER• 12 QUESTION OBJECTIVE QUIZ• JEOPARDY GAME (3 categories –

4 levels)• STUDY GUIDE (concepts, terms,

defs)

Compare/contrast chart: • Create a chart that Compares and Contrasts photosynthesis and cellular respiration.

• For Help: Chapter 4, starting on Page 80• Include:

• Organelles (chloroplast/mitochondria)• Balanced equations• Basic information • Why is this important?