Photosynthesis, Cellular Respiration, and a little Fermentation

Photosynthesis, Photosynthesis, Cellular Respiration, Cellular Respiration, and a little and a little FermentationFermentation

First why do leaves change First why do leaves change colors??colors??

Chlorophyll B

Chlorophyll A

Xanthophyll

Carotene

What does it take to What does it take to grow a plant???grow a plant???

How do we grow a How do we grow a plant?plant?

But is that all????

PhotosynthesisPhotosynthesis

PhotosynthesisPhotosynthesis

PhotosynthesisPhotosynthesis

Photosynthesis Photosynthesis Sunlight (light Energy)

Water H2O

Carbon Dioxide CO2

PhotosynthesisPhotosynthesisSunlight

(Light Energy)

WaterH2O

Carbon Dioxide

CO2

GlucoseC6H12O6

OxygenO2

PhotosynthesisPhotosynthesis

PhotosynthesisPhotosynthesisSunlight

(Light Energy)

WaterH2O

Carbon Dioxide

CO2

GlucoseC6H12O6

OxygenO2

Photosynthesis Photosynthesis Let’s write the chemical equation Let’s write the chemical equation

on the board!!on the board!!

What are the reactants, What are What are the reactants, What are the products?the products?

What type of energy What type of energy transformations are going on?transformations are going on?

Cell RespirationCell Respiration

GlucoseC6H12O6

OxygenO2

Carbon Dioxide

CO2

WaterH2O

Energy

Cell RespirationCell RespirationGlucoseC6H12O6

OxygenO2

Carbon Dioxide

CO2

WaterH2O

Energy

Cell RespirationCell Respiration Let’s draw the chemical formula Let’s draw the chemical formula

on the board!!on the board!!

What are the reactants, What are What are the reactants, What are the products?the products?

What type of energy What type of energy transformations are going on?transformations are going on?

It’s a cycle in plant cells, Jennnnay

The process of cellular The process of cellular respiration is taking respiration is taking place in your cells right place in your cells right now!!now!!

You are currently taking in oxygen You are currently taking in oxygen and burning sugars within the and burning sugars within the mitochondria to release chemical mitochondria to release chemical energy. energy.

This process is also known as This process is also known as Aerobic Respiration. Why?Aerobic Respiration. Why?– Because Oxygen is present which Because Oxygen is present which

allows your cells to burn glucose into allows your cells to burn glucose into energy much more efficiently.energy much more efficiently.

– I am sure you have heard of Aerobics.I am sure you have heard of Aerobics.

What would happen if your What would happen if your cells were deprived of oxygen?? cells were deprived of oxygen?? Would they still be able to burn Would they still be able to burn glucose to make energy??glucose to make energy?? YES!!YES!! FermentationFermentation

– When might this occur?When might this occur?– Long distance runners often create an Long distance runners often create an

anaerobic environment for their cellsanaerobic environment for their cells What does anaerobic mean??What does anaerobic mean??

– No Oxygen presentNo Oxygen present– Not a very energy efficient process Not a very energy efficient process

and a bad side effect is produced:and a bad side effect is produced: Lactic AcidLactic Acid

A different example of A different example of fermentationfermentation Breweries rely on this process:Breweries rely on this process:

– Yeast cells need energy to survive, Yeast cells need energy to survive, so they will breakdown sugars in so they will breakdown sugars in anaerobic conditions and a anaerobic conditions and a byproduct is alcohol.byproduct is alcohol.

– How do you know COHow do you know CO22 is produced? is produced?

Based on the graph, what color is this plant:

0%

0%

0% 1. Green2. Red3. Violet

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Based on the graph, what colors are best absorbed by this plant:

0%

0%

0%

0% 1. Green and orange2. Red and violets3. Violet and green4. Green and reds

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

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Based on the graph below, which color light is least absorbed by plants for

photosynthesis

0%

0%

0%

0%

0% 1. Red2. Yellow3. Green4. Orange5. Violet

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What is this graph showing you??

pH

A scientist wants to study photosynthesis in a newly discovered species. Which of these cell

structures should the scientist study?

Vacuole

s

Chloroplasts

Mito

chond

ria

Ribosomes

0% 0%0%0%

1. Vacuoles 2. Chloroplasts3. Mitochondria4. Ribosomes

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Muscle cells require more energy than do most other cells. Which organelles would you expect to find

in greater abundance in muscle cells than in most other cells?

Cilia

Mito

chond

ria

Ribosomes

Chloroplasts

0% 0%0%0%

1. Cilia2. Mitochondria3. Ribosomes4. Chloroplasts

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Which of these processes results in carbon dioxide production?

Osm

osis

Respira

tion

Evapora

tion

Photosynthe

sis

0% 0%0%0%

1. Osmosis2. Respiration3. Evaporation4. Photosynthesis

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Some organisms that live in the intestines of cows do not require oxygen to survive. Which of these

best describes the process by which these organisms obtain energy?

Osm

osis

Mito

sis

Cellular

resp

iratio

n

Fermen

tation

0% 0%0%0%

1. Osmosis2. Mitosis3. Cellular

respiration4. Fermentation

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Let’s fill in this chart with the molecules and then the energy transformations

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