Photosynthesis Flashcards
lecture 7
Photosynthesis is responsible for..
almost all the planet’s energy resources
What is the site of photsynthesis
Chloroplasts
Three membranes of the chloroplast are:
- Outer
-Inner
-Thylakoid
Three compartments of the chloroplast are:
- Intermembrane space
-Stroma
-Thylakoid space
Light reactions take place on the
thylakoid membrane
Carbon fixations occurs in the
stroma
Photosystems capture
light energy
What are photosystems
Protein complexes that contain chlorophyll in the thylakoid membrane
What absorbs light energy
Chlorophyll
Due to the photosystem structure,
the light energy absorbed by chlorophyll results in movement of high energy electrons
The photosynthetic electron transport chain
Chlorophyll in the photosystems capture light energy and convert it to chemical energy. These high energy electrons move through the photosynthetic electron transport chain
In the light reactions, water has been split. What else has been produced?
Oxygen, ATP and NADPH
NADPH
Nicotinamide adenine dinucleotide phosphate
In the calvin cycle or carbon fixation, what happens?
The ATP and NADPH produced in the light reactions are used to fix carbon dioxide and produce carbohydrate
The output of the calvin cycle is..
a 3 carbon sugar that, when combined with another 3 carbon sugar, is converted to glucose
Plant cells break down..
glucose from photosynthesis in the mitochondria using cellular respiration
Input of photosynthesis
Light, water and carbon
Output of photosynthesis
Glucose and oxygen
The ATP and NADPH produced in light reactions are only used in..
the calvin cycle
What are the energy supply in plants and animals
Glucose and ATP, ATP Synthase
Both animals and plants breakdown glucose in cellular respiration to
generate ATP
Animals must have an external source of
glucose
Plants generate glucose during photosynthesis and then..
break this down during respiration
Almost all glucose on earth has directly or indirectly come from..
photosynthesis
