Cellular Respiration
Michael Slemp
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!!!!!
Review of photosynthesis
1.
2.
3.
4.
5.
6.
7.
8.
What is the definition of photosynthesis?
What ingredients do you need for photosynthesis?
Name the organelle where photosynthesis occurs?
What is the function of chlorophyll and where is it
found?
Name the 2 stages of photosynthesis. Where do they
take place? (be specific)
You can work with
Briefly describe stage 1
your partner to come
up with the answers.
Briefly describe stage 2
What is the final product?
Review of photosynthesis
1.
Important
information! Make
sure you know it!
What is the definition of photosynthesis?
It’s a process in which plants capture energy from sunlight
and converts it into chemical energy of sugars (glucose)
2.
What ingredients do you need for photosynthesis?
Sunlight energy, carbon dioxide and water
3.
Name the organelle where photosynthesis occurs?
Chloroplast
4.
What is the function of chlorophyll and where is it
found?
To absorb sunlight (red and blue wavelengths), found
on the thylakoids
5.
Name the 2 stages of photosynthesis. Where do they
take place? (be specific)
Stage 1 = light-dependent happens on thylakoinds
Stage 2 = light-independent happens in stroma
Briefly describe stage 1
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)
6.
7.
8.
Briefly describe stage 2
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
What is the final product? Glucose and oxygen
Sunlight
energy
Photosynthesis
Energy rich
molecule (glucose)
We have just reviewed
Remember
this slide
from last
class?
Plants, animals and humans use glucose as source of energy
Will be talking about today
What happens when we eat?
Digestion
Complex
molecules
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)
Simple molecules
(like glucose)
Glucose is
transported
into cells
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?
Add notes to your picture as you see on this slide.
Make sure you have room for more notes!!!
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
How cell makes ATP from glucose?
GLYCOLYSIS
Add notes on the left side of
your cell drawing
Splits glucose molecule into two
three-carbon molecules and makes
2 ATP molecules
Remember formula for glucose? C6H12O6 = 6 carbons
1 2 3 4 5 6
1 2 3 + 4 5 6
glucose
Two 3-carbon molecules
+ 2 ATP
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 Share
1. Definition of glycolysis
2. Where in cell does glycolysis
happen?
3. What does anaerobic process
means?
4. What are the final products of
glycolysis?
Discuss with your
partner.
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)
How cell makes ATP from glucose?
Add notes on the right side
of your cell drawing
CELLULAR RESPIRATION
Releases chemical energy from
sugars (and other carbon-based
molecules) to make ATP when
oxygen is present (aerobic process)
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?
Add notes on the right side
of your cell drawing
Outer
membrane
Lets draw a mitochindria
Inner
membrane
(stage 2 of
cellular
respiration)
Matrix = fluid
inside
mitochindria
(stage 1 of
cellular
respiration)
How cell makes ATP from glucose?
Add notes on the right side
of your cell drawing
Remember the final
product of glycolysis?
Two 3-carbon molecules
CELLULAR RESPIRATION
Stage 1 = Krebs cycle
Produces molecules that carry
energy into the 2nd stage
3-carbon molecules are
broken down in cycle of
chemical reactions
Happens in the matrix
of mitochondria
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?
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-share
Discuss with your
partner
1. Definition of cellular respiration
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-share
1. CELLULAR RESPIRATION Releases chemical
energy from sugars (and other carbon-based
molecules) to make ATP when oxygen is present
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
Do not write, just pay
attention
GLYCOLYSIS
In cytoplasm
Anaerobic – no O2
Starts: Glucose molecule
Ends: two 3-carbon
molecules and 2 ATP
TOTAL 36-38 ATP
Final Overview
CELLULAR
RESPIRATION
Inside of mitochondria
Aerobic – needs O2
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 heat