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Cellular Respiration Michael Slemp. BELL WORK  Compare and contrast the similarities and differences of light dependent reactions to that of light independent.

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Presentation on theme: "Cellular Respiration Michael Slemp. BELL WORK  Compare and contrast the similarities and differences of light dependent reactions to that of light independent."— Presentation transcript:

1 Cellular Respiration Michael Slemp

2 BELL WORK  Compare and contrast the similarities and differences of light dependent reactions to that of light independent reactions.  USE COMPLETE SENTENCES AND BE DETAILED!!!!!

3 Review of photosynthesis 1. What is the definition of photosynthesis? 2. What ingredients do you need for photosynthesis? 3. Name the organelle where photosynthesis occurs? 4. What is the function of chlorophyll and where is it found? 5. Name the 2 stages of photosynthesis. Where do they take place? (be specific) 6. Briefly describe stage 1 7. Briefly describe stage 2 8. What is the final product? You can work with your partner to come up with the answers.

4 Review of photosynthesis 1. What is the definition of photosynthesis? 2. What ingredients do you need for photosynthesis? 3. Name the organelle where photosynthesis occurs? 4. What is the function of chlorophyll and where is it found? It’s a process in which plants capture energy from sunlight and converts it into chemical energy of sugars (glucose) Sunlight energy, carbon dioxide and water Chloroplast To absorb sunlight (red and blue wavelengths), found on the thylakoids Important information! Make sure you know it!

5 5. Name the 2 stages of photosynthesis. Where do they take place? (be specific) 6. Briefly describe stage 1 7. Briefly describe stage 2 8. What is the final product? Stage 1 = light-dependent happens on thylakoinds Stage 2 = light-independent happens in stroma Light-dependent: chlorophyll captures sunlight energy, water molecule is broken down, oxygen is released and energy is transferred to molecules that carry energy (like ATP) Light-independent: uses energy from light-dependent reaction, carbon dioxide is added to a cycle of reactions to form larger molecules, molecule of simple sugar (glucose) is formed Glucose and oxygen

6 Sunlight energy Photosynthesis Energy rich molecule (glucose) Plants, animals and humans use glucose as source of energy Remember this slide from last class? We have just reviewed Will be talking about today

7 What happens when we eat? Complex molecules Digestion Simple molecules (like glucose) Glucose is transported into cells Remember ? Glucose is too large to be used by cells (it’s the $100 bill). All cells need energy in smaller units called ATP (this is your $1 bill)

8 How cell makes ATP from glucose? Making ATP is complex process involving multiple steps and enzymes. We will learn the simplified version today. Use blank sheet in your notebook (landscape) Draw animal cell in the middle, include all major parts (do not forget mitochondria). Make sure you have enough space on both sides of the picture for adding notes.

9 How cell makes ATP from glucose? When glucose enters cell it undergoes in cytoplasm a process called GLYCOLYSIS (glyco = sugar, lysis = break down) Products of glycolysis enters mitochondria and undergoes 2-stage process called CELLULAR RESPIRATION Add notes to your picture as you see on this slide. Make sure you have room for more notes!!!

10 How cell makes ATP from glucose? GLYCOLYSIS Splits glucose molecule into two three-carbon molecules and makes 2 ATP molecules Add notes on the left side of your cell drawing Remember formula for glucose? C6H12O6 = 6 carbons ATP glucoseTwo 3-carbon molecules

11 How cell makes ATP from glucose? GLYCOLYSIS Add notes on the left side of your cell drawing Happens in cytoplasm Process that does not require oxygen = anaerobic process Final product: Two 3-carbon molecules (enters into mitochondria) 2 ATP molecules (energy usable by cell)

12 Pair Share 1. Definition of glycolysis Discuss with your partner. 2. Where in cell does glycolysis happen? 3. What does anaerobic process means? 4. What are the final products of glycolysis?

13 Pair Share GLYCOLYSIS Splits glucose molecule into two three-carbon molecules and makes 2 ATP molecules Happens in cytoplasm Process that does not require oxygen = anaerobic process Final product: Two 3-carbon molecules (enters into mitochondria 2 ATP molecules (energy usable by cell)

14 How cell makes ATP from glucose? CELLULAR RESPIRATION Releases chemical energy from sugars (and other carbon-based molecules) to make ATP when oxygen is present (aerobic process) Add notes on the right side of your cell drawing You can think of it as opposite of photosynthesis glucose + oxygen = carbon dioxide + water + ATP Cellular respiration happens in 2 steps inside of mitochondria

15 How cell makes ATP from glucose? Add notes on the right side of your cell drawing Lets draw a mitochindria Outer membrane Inner membrane (stage 2 of cellular respiration) Matrix = fluid inside mitochindria (stage 1 of cellular respiration)

16 How cell makes ATP from glucose? Add notes on the right side of your cell drawing Happens in the matrix of mitochondria CELLULAR RESPIRATION Remember the final product of glycolysis? Two 3-carbon molecules 3-carbon molecules are broken down in cycle of chemical reactions Stage 1 = Krebs cycle Produces molecules that carry energy into the 2 nd stage

17 How cell makes ATP from glucose? Add notes on the right side of your cell drawing CELLULAR RESPIRATION Stage 1 = Krebs cycle Final products: small number of ATP (ready to be used by cell) carbon dioxide is released energy-carrying molecules (other than ATP) Remember, we said ATP is like $1.00 bill? Well, other energy-carrying molecules produced in this stage are like $20 bills which cells cannot use. That is why these other energy-carrying molecules enter 2 nd stage of cellular respiration.

18 How cell makes ATP from glucose? Add notes on the right side of your cell drawing CELLULAR RESPIRATION Stage 2 = Electron transport Uses energy-carrying molecules from stage 1 and oxygen to produce more ATP Happens on the inner membrane Energy from energy-carrying molecules is transferred to chains of proteins in the inner membrane Final products: ATP water heat (escapes)

19 Pair-share 1. Definition of cellular respiration Discuss with your partner 2. What is aerobic process? 3. What is the name of stage 1 of cellular respiration? Where does it happen and what are the final products? 4. What is the name of stage 2 of cellular respiration? Where does it happen and what are the final products?

20 Pair-share 2. AEROBIC process needs the presence of oxygen 3. STAGE 1 = Krebs cycle, happens in matrix of the mitochondria. Final products are: small number of ATP, carbon dioxide and energy-carrying molecules (other than ATP) 4. STAGE 2 = Electron transport, happens on the inner membrane in mitochondria. Final products: ATP, water and heat 1. CELLULAR RESPIRATION Releases chemical energy from sugars (and other carbon-based molecules) to make ATP when oxygen is present

21 Final Overview GLYCOLYSIS CELLULAR RESPIRATION Do not write, just pay attention In cytoplasm Inside of mitochondria Anaerobic – no O2 Aerobic – needs O2 Starts: Glucose molecule Ends: two 3-carbon molecules and 2 ATP Stage 1 = Krebs cycle (matrix) Starts: 3-carbon molecule Ends: some ATP, CO2 and energy-carrying molecules Stage 2 = electron transport (inner membrane) Starts: energy-carrying molecules and oxygen Ends: ATP, water and heat TOTAL ATP


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