Chapter 10 Photosynthesis Flashcards
What drives the endergonic reaction in photosynthesis?
Energy from light
The organelles in plants that carry out photosynthesis
Chloroplasts
What has the green pigment and absorbs light?
Chlorophyll
Describe the anatomy of chloroplast
Outer and inner membrane, inter membrane space, 3rd membrane (thylakoid) contains pigment molecules
A stack of thylakoids make up the _________
Granum
The tiny openings where gassed pass though in pants
Stomata
The liquid part inside the chloroplast
Stroma
What is the equation for photosynthesis?
6 CO2 + 12 H2O + Light Energy
Yields
C6H12O6 + 6 O2 + 6 H2O
Chloroplasts split water into hydrogen and oxygen, incorporating the electrons of ____________ into sugar molecules
O2 is released as a by product
Hydrogen
Photosynthesis is a redox reaction in which ________ is oxidized and ______________ is deduced
Water, CO2
Endergonic redox process, energy is used to reduce ___________
CO2
Photosynthesis consist of what two stages
Light reactions (photo part), Calvin cycle (the synthesis part) ***
Where does the photo part occur?
In thylakoid membrane of chloroplast
Steps of the light reactions
- split water
- releases oxygen
- reduces NADP+ to NADPH
- generate ATP from ADP by photophosphorylation
Where does the Calvin cycle take place?
Stroma
Steps in the Calvin cycle
- CO2 is incorporated into existing organic molecules (carbon fixation)
- reduced fixed carbon into carbohydrate (sugar)
- ATP -provides chemical energy - NADPH -provides reducing power
Thylakoids transform light energy into the chemical energy of _____ and ________
ATP, NADPH
Light is a type of _____________ radiation
Electromagnetic
Do shorter or longer wavelengths have more energy?
Shorter
What is the wavelength range for visible light?
380-750 nm
What light drive photosynthesis?
Visible light
Each pigment absorbs a specific ______________
Wavelength
Substances that absorb visible light
Pigments in the chloroplast
Wavelengths that are not absorbed are _________ or ________
Reflected or transmitted