Date post: | 13-Apr-2017 |
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10-27-16 Warm up1. How do we get the
energy we need? 2. What group of
organisms makes this for us (and most other living things)?
10-27-16
Warm upMitochondria Lesson
Cancelled: quiz tomorrow
As always…
Key concepts are underlined
Vocabulary terms will be in green
How cells use GLUCOSE
Your goal
Explain what happens to food energy in cells
On your whiteboard
What are the 7 characteristics of life?How many can you remember?
– All living things are made of cells– All living things have DNA– All living things reproduce
– All living things use materials and energy– All living things grow and develop
– All living things respond to their environment– All living things maintain homeostasis
You already know this! :)
Equation for photosynthesis:
H2O + CO2 ----------------> C6H12O6 + O2
water + carbon dioxide ------------------> + oxygen
Light energy
Light energyglucose
So what is glucose?
Divide your whiteboard into 3 columnsFill in the information about glucose
Chemical formula
Complete the sentence: “Glucose is used for_______”
Complete the sentence: “Glucose is a ______”
The following 6 slides
Are a review of macromolecules – it’s been a long time
Identifying the 4 Organic Macromolecules
1.1. CarbohydratesCarbohydratesThese are BIG molecules -
macromoleculesThey are polymers made up of
many simple, repeating monomers
The monomers monomers of carbohydrates areare…
SUGARSSUGARS called monosaccharidesmonosaccharides
Quick Check - Whiteboards• A carbohydrate…is it a monomer or a
polymer?
Quick Check - whiteboards• Simple sugar - monosaccharide…is it a
monomer or a polymer?
Practice Drawing it - whiteboards• Draw a monomer of a carbohydrate
• Write the name of the monomer you drew
or monosaccharide
simple sugar
glucose
fructose
Carbohydrates• An important simple sugar is glucoseAn important simple sugar is glucose
carbohydrates
Monomer: Simple Sugar
Compound: Carbohydrate
Living things use food to get the materials and energy they need
But cells can’t use food molecules like glucose directly for energyThe mitochondria FIRST turns food energy into a form of energy the cell can use directly.
ATP
Mitochondria break down glucose and convert the food energy into lots of ATP during cellular respirationATP is the form of energy that is useful to cells
ATP
ATP
ATP
ATP
ATP
ATP
It’s kind of like a gumball machine
Food energy is like dollar billsLots of energy - but too big for cells to use directlyThe mitochondria can change the Big food energy into a usable form
Quick Check – on your whiteboard
In my analogy:What does the dollar bill represent?What do the pennies represent?What does the gumball machine represent?Try to think of another analogy - something large that must be broken into smaller pieces to be useful
The steps
1 - glucose enters the cell2 - the cell breaks glucose in ½ and makes a little ATP3 - the mitochondria breaks the ½ sugar the rest of the way down to release all the energy in it4 - the energy released from glucose is stored in ATP5 - ATP can now power the work of the cell
You try
Work with the person sitting next to youTry to arrange the cards in the correct order
–From glucose to ATP
ATP
ATP ATP
You try
Fill in the blanksThen we will read it aloud
FILL in the BLANKS then READ ALOUD
• Cells use food molecules like ________ for energy. But these molecules must first be broken down by the _________. The energy in glucose can then be _____ in molecules of _____. ATP is a useful form of _______ for cells.
Word bank:• Energy• Glucose
• ATP• Mitochondria
• Stored
Practice Questions – with your neighbor
Choose the correct answerExplain WHY it is correct
Choose an answer and explain why you chose it
The role of the mitochondria is toa. Convert light energy into chemical energyb. Convert chemical energy to light energyc. Convert the chemical energy of food into
the chemical energy of ATPd. Convert ATP energy into a form that is
useful to cells
Choose an answer and explain why you chose it
The work of cells is powered byA. ATPB. Food moleculesC. Glucose moleculesD. Mitochondria
Researchers noticed that certain cells have many mitochondria, more than other cells they have observed.
What kind of cells would have high numbers of mitochondria and why?
We need lots of ATP to run this fast!
Why do cells need ATP to do work?
Can’t store ATP– Too unstable– Can only be used in
the cell that made it– Only short term
energy storage
Carbohydrates and lipids are for long-term energy storage
So our goal was to…
Explain what happens to food energy in cells.
Do you know?
Your turn Choose 1 of the following tasks
Task 1: Create a flow chart that outlines what happens to food energy in cells– Make sure to use these
words in your response: foodfood, glucose, glucose, mitochondria, ATP, mitochondria, ATP, energy, energy, stored, stored, releasedreleased
Task 2: Draw and label a diagram that shows what happens to food energy in cells– Be sure to include:
mitochondria, mitochondria, food, glucose food, glucose molecule, ATP molecule, ATP molecules, molecules, energy energy stored, energy stored, energy released.released.