Cellular RespirationCellular Respiration

Michael SlempMichael Slemp

BELL WORKBELL WORK

Compare and contrast the similarities and Compare and contrast the similarities and differences of light dependent reactions to differences of light dependent reactions to that of light independent reactions.that of light independent reactions.

USE COMPLETE SENTENCES AND BE USE COMPLETE SENTENCES AND BE DETAILED!!!!!DETAILED!!!!!

Review of photosynthesisReview of photosynthesis

1.1. What is the definition of photosynthesis?What is the definition of photosynthesis?

2.2. What ingredients do you need for photosynthesis?What ingredients do you need for photosynthesis?

3.3. Name the organelle where photosynthesis occurs?Name the organelle where photosynthesis occurs?

4.4. What is the function of chlorophyll and where is it What is the function of chlorophyll and where is it found?found?

5.5. Name the 2 stages of photosynthesis. Where do they Name the 2 stages of photosynthesis. Where do they take place? (be specific) take place? (be specific)

6.6. Briefly describe stage 1Briefly describe stage 1

7.7. Briefly describe stage 2Briefly describe stage 2

8.8. What is the final product?What is the final product?

You can work with your partner to come up with the answers.

Review of photosynthesisReview of photosynthesis

1.1. What is the definition of photosynthesis?What is the definition of photosynthesis?

2.2. What ingredients do you need for photosynthesis?What ingredients do you need for photosynthesis?

3.3. Name the organelle where photosynthesis occurs?Name the organelle where photosynthesis occurs?

4.4. What is the function of chlorophyll and where is it What is the function of chlorophyll and where is it found?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 Name the 2 stages of photosynthesis. Where do they take place? (be specific) take place? (be specific)

6.6. Briefly describe stage 1Briefly describe stage 1

7.7. Briefly describe stage 2Briefly describe stage 2

8.8. What is the final product?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

Sunlight energy

Photosynthesis Energy rich molecule (glucose)

Plants, animals and humans use glucose as source of energyRemember this slide from last class?

We have just reviewed

Will be talking about today

What happens when we eat?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)

How cell makes ATP from glucose?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.

How cell makes ATP from glucose?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!!!

How cell makes ATP from glucose?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

1 32 5654 1 32 4 6+ + 2 ATP

glucose Two 3-carbon molecules

How cell makes ATP from glucose?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)

Pair SharePair Share1. 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?

Pair SharePair ShareGLYCOLYSIS

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)

How cell makes ATP from glucose?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

How cell makes ATP from glucose?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)

How cell makes ATP from glucose?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 2nd stage

How cell makes ATP from glucose?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 2nd stage of cellular

respiration.

How cell makes ATP from glucose?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: 34-36 ATP water heat (escapes)

Pair-sharePair-share1. 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?

Pair-sharePair-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: 34-36 ATP, water and heat

1. CELLULAR RESPIRATION Releases chemical energy from sugars (and other carbon-based

molecules) to make ATP when oxygen is present

Final OverviewFinal Overview

GLYCOLYSISCELLULAR

RESPIRATION

Do not write, just pay attention

In cytoplasm Inside of mitochondria

Anaerobic – no O2Aerobic – 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: 34-36 ATP, water and heatTOTAL 36-38 ATP