1. REACTIONS OF PHOTOSYNTHESIS 8-3
REACTIONS OF PHOTOSYNTHESIS 8-3

2.
Remember from CELL BIO
Enzymes for PHOTOSYNTHESIS are in the ________________

3. PHOTOSYNTHESIS HAPPENS IN CHLOROPLASTS
= sac-like
photosynthetic = stack of thylakoids
membranes
inside chloroplast
Image from BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006

4. SPACES
Gel-filled space inside chloroplast surrounding
thylakoid sac
Gel-filled space
Inside the
thylakoid
sac
Gel-filled space OUTSIDE chloroplast but inside the cell membrane

5. PHOTOSYNTHESIS HAPPENS IN CHLOROPLASTS
Proteins that are part of the thylakoid
membrane organize
________________________________ into clusters called _____________________

6. LIVING THINGS NEED ENERGY CARRIERS
Molecule that carries
= _______
Molecule that carries HIGH ENERGY ELECTRONS
= ___________
Images by Riedell

7. HIGH ENERGY ELECTRONS require a special carrier, too
Frying pan image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006
HIGH ENERGY ELECTRONS require a special carrier, too
____________ is one
of the carriers that
cells use to transport
high energy electrons.
________ + _____ + _____ → ____________
_______= nicotinamide adenine dinucleotide phosphate

8. PHOTOSYNTHESIS

9. LIGHT-DEPENDENT REACTIONS
INSIDE THYLAKOID SPACE ↓ ↓ ↓
OUTSIDE THYLAKOID IN STROMA
Image modified from: Pearson Education Inc; Publishing as Pearson Prentice Hall

10. ↓ ↓ WHY DOES PHOTOSYSTEM II COME BEFORE PHOTOSYSTEM I?
It was discovered and named 1st
PHOTOSYSTEM II ↓ ↓
PHOTOSYSTEM I
Image modified from: Pearson Education Inc; Publishing as Pearson Prentice Hall

11. See a video clip about the LIGHT-DEPENDENT REACTION (Part 2) 8D

12. REMEMBER CELL BIO Molecules move automatically from
REMEMBER CELL BIO
Molecules move
automatically from
“where there’s A LOT”
to “where there’s NOT”
Animatioin from:

13.
REMEMBER CELL BIO
Diffusion happens anytime there is a difference in concentration in one place compared to another
= ________________________

14. REMEMBER CELL BIO Diffusion can happen across membranes TOO
REMEMBER CELL BIO
Diffusion can happen across membranes TOO
…as long as membrane will let molecule through

15. LIGHT-DEPENDENT REACTIONS
Pearson Education Inc; Publishing as Pearson Prentice Hall
LIGHT-DEPENDENT REACTIONS
SEE A MOVIE ATP SYNTHASE IN ACTION
See an animation about the
ELECTRON TRANSPORT CHAIN

16. LIGHT DEPENDENT REACTION
Requires______________
Molecules are part of ____________________
Made up of __________________
connected by ______________________
& ___________________
Uses light energy to change
ADP + P → _______
NADP+ + 2e- + H + → _________
Breaks apart ______ molecules and releases _____________

17. PHOTOSYNTHESIS Light-Dependent Reaction Light & Water Oxygen
ATP
NADPH
(CH2O)n
Carbon Dioxide
Light-Independent Reactions
CALVIN CYCLE

18. PHOTOSYNTHESIS OVERVIEW
Pearson Education Inc; Publishing as Prentice Hall

19. Calvin Cycle CO2 Enters the Cycle Energy Input 5-Carbon Molecules
Regenerated
6-Carbon Sugar
Produced
See Calvin cycle animation
Sugars and other compounds

20. CALVIN CYCLE ____________ require ____________
(also called _________________________)
____________ require ____________
Happens in _________ between thylakoids
NADPH donates _______________
ATP donates _________________
CO2 donates ______________
to make __________

21. Factors that Affect Photosynthesis
____________________
Water is one of the raw materials needed, so
A shortage of water can ________________
photosynthesis
Desert plants and conifers
that live in dry conditions
have a waxy coating on
their leaves to prevent
water loss.

22. Factors that Affect Photosynthesis
___________________________________
Photosynthesis enzymes function best between 0° C - 35° C
At temperatures above or below this range, photosynthesis will slow or stop
Conifers in winter may carry out
photosynthesis only occasionally

23. Enzymes work BEST at a certain ___ and __________.
REMEMBER CELL BIO
Enzymes work BEST at a certain ___ and __________.
Conditions that are TOO ACIDIC
or TOO HOT cause proteins
to unwind or _________

24. Denaturing changes the shape of the enzyme making it not work
HOMEOSTASIS (keeping pH and temperature constant) is important for maintaining enzyme function.
Image from:

25. Factors that Affect Photosynthesis
____________________
More light increases rate of photosynthesis
up to a certain level until plant reaches its
maximum rate of photosynthesis
See effect of light experiment

26. THE BIG PICTURE PHOTOSYNTHESIS provides the _____________ we breathe
and the __________
heterotrophs (like us)
consume to survive
_____________ + ____________ _______________ + ____________

27. Concept Map Photosynthesis Section 8-3 includes takes place in uses
take place in
to produce of
to produce