Lecture 7 Flashcards
What is photosynthesis?
Photosynthesis is the major pathway in which energy/carbon are incorporated into carbohydrates
What is the Calvin cycle?
It’s a three step process in which CO2 is used to synthesize carbs, capturing sunlight to chemical form
How does photosynthesis help us?
It produces oxygen
What’s an example on how photosynthesis occurs everywhere
In the desert photosynthetic bacteria form an easily distributed layer on the surface
What’s an uncommon photosynthetic organism?
Geo Syon pyriform trap a group of photosynthetic bacteria in order to do photosynthesis
What is the general equation for photosynthesis and what type of reaction is it?
CO2 plus H2O goes to C6 H12 O6 + O2
Redox reaction
What is related to the oxidation of water?
It is linked with the reduction of CO2 through redox reactions, making up the photosynthetic electron transfer chain
Where does photosynthesis happen?
Photosynthesis begins in the photo systems
What is a photo system?
Photo system is a pigment complex that absorbs light and
What is the movement of electrons used to drive synthesis for ATP and NDPH used for
It is used to synthesize carbs from CO2
What occurs in the chloroplast?
Photosynthesis occurs here
What type of membranes do the chloroplast have?
Like the mitochondria chloroplast have outer and inner membrane
What is a thylakoid membrane?
A membrane around the thylakoid
What is the grana?
A stacked structure of thylakoid membrane
What percent of ATP is consumed in the Calvin cycle?
All ATP is consumed
What is the reactants and product for cell respiration? What type of reaction is it?
The reactants are glucose and O2 while the products are CO2 and H2O. This is an exogenic reaction.
What are the products and reactants for photosynthesis and what type of reaction is it?
Reactants are CO2 and H2O. The products are glucose and oxygen, and this is an endogenic reaction.
How many steps are there in the Calvin cycle and what are the names?
There are three main steps called carboxylation than reduction, then regeneration
What are the three steps in step one carboxylation
CO2 combines with five carbon compound to form RUBP
It’s in catalyzed by RuBisCO to form a six carbon
And then broken to become 2 3-carbon molecules 3-PGA
What happens in reduction for the Calvin cycle?
NADPH and ATP from before the Calvin cycle our use is reducing agents to make Triosephosphate
What happens in regeneration for the Calvin cycle?
Three carbon compounds are recognized/combined to make RUBP
What is starch and how is it stored?
It’s the excess carbs that are converted and stored in the chloroplast
What is light?
Type of electromagnetic radiation
What is visible light?
A portion of the electromagnetic spectrum
What are pigments? How do they contain color?
They are molecules that absorb wavelength of visible light and contain colour due to reflecting light
What is chlorophyl and why is it green?
It’s pigment for photosynthesis and is green as green light is reflected
What are the two types of chlorophyl
Chlorophyl a and chlorophyl B
What happens when light is absorbed?
Heat and fluorescence is released which result in the production of ATP
What does the chlorophyl do with absorbed light?
It uses the energy from that to transfer to another chlorophyl
What is a pair of chlorophyl known as?
The reaction centre
What does the reaction centre do?
They transfer light energy to adjacent electron transfers which sends the energy to another reaction centre to finish the production of NADPH
