22 Sept

Does air have mass?

Agenda




Unit 3 Calendar
Van Helmont
Intro Photosynthesis
Homework
 none
Does air have mass?
YES!
Light
Build Sugar
PHOTOSYNTHESIS
Light Reactions
Calvin Cycle
Overall reaction for photosynthesis
Photosynthesis
Carbon Dioxide + Water
CO2 + H2O +
Light
Light
Sugar + Oxygen
C6H12O6 + O2
Draw a picture of this on a
white board
Photosynthesis
Makes glucose for the plant
23 Sept

Opening:


Where in a plant cell does
photosynthesis occur?
Agenda



Light Reactions & Calvin
Cycle
Photosynthesis Annotation/
Model
Homework


Finish your model
Formative Quiz Tomorrow
Photosynthesis occurs in the chloroplast
Light
Build Sugar
PHOTOSYNTHESIS
Light Reactions
Calvin Cycle
Light Reactions
Chlorophyll captures a photon of light and uses it to
excite an electron.
 That high-energy electron is used to make high-energy
molecules that run the Calvin Cycle.
 Water is split (releasing O2)to provide more electrons
to continue the process.

Calvin Cycle

Carbon dioxide + the high energy molecules from the
light reactions are used to create a simple sugar.

The plant uses that simple sugar to:



Power its cells
Build structures (roots, stems, leaves)
Store energy
24 Sept

Opening:


What does a plant do with
the sugar that it makes?
Agenda



Modeling activity
Artificial Photosynthesis
Homework

none
Artificial Photosynthesis

https://www.youtube.com/watch?v=J556uXwrjII

Photo:http://news.softpedia.com/news/Mimicking-Photosynthesis-in-New-Electronics-164971.shtml#sgal_0
25 Sept

Opening:

Agenda

Photosynthesis/Respiration

Cellular Respiration
Demo
Intro Cellular
Respiration


Homework
 none
Cellular Respiration
Glucose + Oxygen
C6H12O6 + O2
Carbon Dioxide + Water + Energy (ATP)
CO2 + H2O + Energy (ATP)
Occurs in and
around
mitochondria
Mitochondria are everywhere
animal cells
plant cells
What is energy in biology?
ATP
Adenosine TriPhosphate
2009-2010
Using ATP to do work
Can’t store ATP
 too unstable
 only used in cell
that produces it
 only short term
energy storage
carbohydrates &
fats
are long term
energy storage
ATP
Adenosine TriPhosphate
Adenosine DiPhosphate
ADP
A working muscle recycles over
10 million ATPs per second
work
26 Sept

Opening:


What is chlorophyll’s role in
photosynthesis?
Agenda


Life: Plants
Homework
29 Sept

Agenda:


Stages of
Respiration
Homework
A track athlete finds that during her 1 mile-races she always
“dies” in last lap. (1 mile = 4 laps around the track) While walking
around the mall with some friends she sees a vendor selling bottles of
pure ATP. Interested, she starts to talk to the vendor. He tells her,
“You get tired because her body is busy making ATP. If you take
this pure ATP, your cells won’t have to go through respiration, and you’ll
have more energy to finish your race. It’s totally legal because your
body makes it naturally.”
She thinks back to what she learned in biology class, and his
explanation seems to make sense to her, but she’s hesitant.
Think about what you learned in Biology class and answer the following.
1. Do you think the stuff will work? Explain.
2. Do you think she should buy the bottle? Why or why not?
Glycolysis

Sugar is split, releasing a little ATP
and two pyruvate molecules that
enter the Krebs Cycle.

Takes place outside the
mitochondria.

Does not require Oxygen.
Krebs Cycle


The products from glycolysis
(pyruvate) go through a series of
reactions
These reactions release



CO2
a little ATP
high energy electrons
After Krebs Cycle, all the Carbon from
sugar has been converted to CO2
Electron Transport Chain

A series of reactions that use
high-energy electrons from
glycolysis and Krebs

Only works if Oxygen is
present

Releases H2O & a
lot of ATP
C6H12O6 + O2
-From
Glucose
-Released
during Krebs
CO2 + H2O + Energy (ATP)
-From O2
-Released during
ETC
Released from
glycolysis,
Krebs, & ETC
30 Sept

Agenda:



Fermentation
Review
Homework:

Test on Thursday
What if oxygen is missing?


No oxygen available = can’t complete aerobic
respiration
Anaerobic respiration

also known as fermentation




O2
alcohol fermentation
lactic acid fermentation
can only make very little ATP
large animals cannot survive
yeast
bacteria
Anaerobic Respiration

Fermentation

alcohol fermentation

yeast



glucose  ATP + CO2+ alcohol
make beer, wine, bread
lactic acid fermentation

bacteria, animals



glucose  ATP + lactic acid
bacteria make yogurt
Animal muscle cells go
through L.A. fermentation,
but brain cells can’t.
O2
Practice short answer questions

Explain how photosynthesis and respiration are related.


Respiration and photosynthesis are related in that the outputs
from one process are used as the inputs for the other.
Photosynthesis uses the CO2 and H20 from cellular respiration
to make glucose and O2 which, in turn is used to drive Cellular
respiration.
Explain why it is not enough for organisms to eat food in
order to function. Why do we need to go through the
process of Cellular Respiration?

Our cells cannot directly use the food we eat to complete
cellular functions. Our cells rely on ATP to act as the energy
molecule that drives cellular function. Cellular respiration uses
the energy in food to create ATP for our cells to use.
30 Sept

Agenda:


Review for Exam
Homework:

Test Tomorrow