February 19, 2015 February 20, 2015 Welcome Back Fellow Dodgers! Thank a plant today for the oxygen that you breathe! Collecting Observing Stomata in.

February 19, 2015February 20, 2015

• Welcome Back Fellow Dodgers! • Thank a plant today for the oxygen that you breathe!• Collecting Observing Stomata in Leaves Lab.• Collected Observing Diffusion and Osmosis Lab• Love Letter to Photoautotroph is due tomorrow – Friday,

February 20, 2015 either by hard copy or via email. If via email – make sure that you write Photoautotroph in the subject.

• Unit 6: Photosynthesis and Structure of Leaves Test is scheduled for Next Week!

Goals for Today

• Review differences between C3, C4 and CAM plants.• Examine the structure of the chloroplast• Relate the structure of the chloroplast to the biochemical

pathway of photosynthesis.• Relate the structure of chloroplast to pigments.• Introduce the importance of pigments to photosynthesis.

Collaborating Leads to Higher Thinking

• Form Learning Pods• Within your pods you will be collaborating to determine

the answers.• Discussion and collaboration are the keys to success.• Your group is collectively responsible for the answers;

however, each of you is individually responsible for recording all information within your notes.

Directions: For each statement below, determine if the statement relates to PEP carboxylase only, Rubisco only, or BOTH.

PEP Carboxylase vs. Rubisco1. Present in C3, C 4 and CAM plants

2. Participates in Calvin Cycle of Photosynthesis

3. Produces a four carbon stable compound that acts as a reservoir of Carbon Dioxide for the Calvin Cycle.

4. Produces an acid that acts as a reservoir of Carbon Dioxide for the Calvin Cycle.

5. Found in C4 plants

6. Found in CAM plants

7. Eliminates photorespiration.

8. Oxygen competes with Carbon dioxide for its active site.

9. An adaptation that enables plants to live in variable environments.

10. Plants that keep their stomata closed do not worry about build up of oxygen within their leaves due to this enzyme.

Answers

1. Present in C3, C 4 and CAM plants Rubisco

2. Participates in Calvin Cycle of Photosynthesis Rubisco

3. Produces a four carbon stable compound that acts as a reservoir of Carbon Dioxide for the Calvin Cycle. PEP Carboxylase

4. Produces an acid that acts as a reservoir of Carbon Dioxide for the Calvin Cycle. PEP Carboxylase

5. Found in C4 plants BOTH

6. Found in CAM plants BOTH

7. Eliminates photorespiration. PEP Carboxylase

8. Oxygen competes with Carbon dioxide for its active site. Rubisco

9. An adaptation that enables plants to live in variable environments. PEP Carboxylase

10. Plants that keep their stomata closed do not worry about build up of oxygen within their leaves due to this enzyme. PEP Carboxylase

Chloroplast and Photosynthesis

• Draw and label the structure of a chloroplast. (Unit 4)• How does the structure of the chloroplast provide evidence

for the evolution of eukaryotic cells?• In which structures within plants will you find

chloroplasts?• Which cells within plants contain chloroplasts? Be

specific?• How is the chloroplast structure related to photosynthesis?• How is the chloroplast structure related to pigments?

Draw and label the structure of a chloroplast. (Unit 4)

How does the structure of the chloroplast provide evidence for the evolution of eukaryotic cells?

• Theory of Endosymbiosis

The Theory of Endosymbiosis states that the chloroplast and mitochondria were once free – living bacteria. One bacteria surrounded and engulfed another bacteria. The combined cells lost their independence and evolved into a eukaryotic cell.

• The chloroplast has a double membrane, ribosomes, a single, circular DNA and is the same size as a bacteria.

In which structures within plants will you find chloroplasts?Which cells within plants contain chloroplasts? Be specific?

• Photosynthesis takes place within the leaves of plants.

• Chloroplasts are found within the Palisades layer cells and within spongy layer cells.

How is the chloroplast structure related to photosynthesis?How is the chloroplast structure related to pigments?

• The Light Dependent Reactions take place within the Thylakoids. The Light Independent Reactions take place within the stroma.

• The pigments are found within the thylakoids. We know this because the Light Dependent Reactions take place within the thylakoids and pigments transform light energy into excited electrons!