Back to AI Flashcard MakerBiology /OCR Biology A - 5.2.1 - Photosynthesis Part 2

OCR Biology A - 5.2.1 - Photosynthesis Part 2

Biology20 CardsCreated about 1 month ago

This deck covers key concepts of photosynthesis, focusing on the structure of chloroplasts, the process of photophosphorylation, and the Calvin cycle.

Chloroplast membrane

Both inner and outer membrane
Tap or swipe ↕ to flip
Swipe ←→Navigate
1/20

Key Terms

Term
Definition
Chloroplast membrane
Both inner and outer membrane
Integranal lamellae
Extension of thylakoid membrane Acts as skeleton
Intermembrane space
Space between membranes (10-20nm)
Granum
Stack of thylakoids Plural grana
Stroma
Contains enzymes needed for photosynthesis, DNA and ribosomes
Thylakoids
Where the green pigment is found | Site of light absorption and ATP synthesis

Related Flashcard Decks

Study Tips

  • Press F to enter focus mode for distraction-free studying
  • Review cards regularly to improve retention
  • Try to recall the answer before flipping the card
  • Share this deck with friends to study together
TermDefinition
Chloroplast membrane
Both inner and outer membrane
Integranal lamellae
Extension of thylakoid membrane Acts as skeleton
Intermembrane space
Space between membranes (10-20nm)
Granum
Stack of thylakoids Plural grana
Stroma
Contains enzymes needed for photosynthesis, DNA and ribosomes
Thylakoids
Where the green pigment is found | Site of light absorption and ATP synthesis
Chromatogrophy table
Pigment Distance travelled by compound Distance travelled by solvent Rf value
Paper chromatogrophy to seperate pigments
Dissolve pigments in solvent (propan-2-ol) Using chromatography paper Allow the solvent to move up the paper and seperate the pigments Diff pigments would move at diff speeds up the paper Calculate Rf values
Why do plants contain a mixture of diff pigments
Light is made up of many diff wavelengths | To allow plants to absorb maximum light for photosynthesis
Photophosrylation
Production of ATP in the presence of light from ADP and Pi
ATP
Adenosine tri-phosphate | Formed from inorganic phosphate and ADP during photophosphorylation
NADP
Co.enzyme reduced to NADPH by the addn. of protons and electrons at the end of the light dependent stage
Photolysis
2H2O ---> 4 H+ and 4 e- and O2 H+ and e- used in photophosphorylation O2 used in respiration and/or released
Non cyclic photophosphorylation
Involves PSII and PSI | Produces ATP, oxygen and reduced NADP
Cyclic photophosphophorylation
Involves PSI | Produces ATP in smaller amounts. No photolysis involved so no protons or oxygen produced
Process of cyclic photophosphorylation
Light hits a chlorophyll molecule in PSI and e- in primary pigment is raised to a higher energy level until it leaves Passed along electron transport chain and energy is released in small amounts to pump H^+ into the thylakoids disc Builds up conc. gradient Diffuse back out through specialised channels attached to ATP synthase Movement provides energy to combine ADP and Pi (chemiosmosis)
Non-cyclic vs cyclic photophsophophorylation
The electrons from the chlorophyll a aren't passed onto NADP but are passed back to PSI via electron carriers
Role of chlorophyll in photolysis
It is the lost electrons from photolysis that go to the chlorophyll after absorbing light Causes more water to dissociate
How is energy of light converted into chemical energy in the LDR
Electrons excited Use of electrons carriers Production of ATP
Calvin cycle
6 CO2 (+ RuBisCO) ---> 12 GP (+12 ATP) ---> 1,3 biphosphate (+12 NADPH) ---> 12 TP ---> 10 TP (5 ATP) ---> 6 RuBP