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Flashcards in Overview of Photosynthesis Deck (19)
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1
Q

How is the diversity of life possible?

A

-Bc our planet is overflowing in energy streaming Earthward from the sun

2
Q

How much energy does photosynthesis capture?

A

-About 1% of the huge supply of energy= 10,000 hiroshima bombs

3
Q

What are the 2 forms of Photosynthesis?

A
  • Anoxygenic

- Oxygenic

4
Q

What is Anoxygenic photosynthesis?

A
  • Is the form that doesn’t produce oxygen bc they convert hydrogen sulfide (H2S) in globules of pure sulfur that accumulates inside of them
  • It’s found in 4 different bacterial groups
5
Q

What are the 4 bacterial groups that Anoxygenic photosynthesis is found?

A
  • Purple bacteria
  • Green sulfur bacteria
  • Green non-sulfur bacteria
  • Heliobacteria
6
Q

What is Oxygenic photosynthesis?

A
  • It is the form that produces oxygen

- It is found in cyanobacteria, 7 groups of algae & all land plants

7
Q

What does Anoxygenic & Oxygenic photosynthesis have in common?

A

-The types of pigments that they use to trap light energy

8
Q

How does Anoxygenic & Oxygenic photosynthesis differ?

A

-In the arrangement & action of these pigments

9
Q

Where does photosynthesis take place?

A

-In the leaves bc the leaves have organelles= chloroplasts

10
Q

What are the 3 stages of photosynthesis?

A

1) capturing energy from sunlight then it
2) uses the energy to make ATP and reduce the NADP+ compound to NADPH and then
3) it uses the ATP & NADPH to power photosynthesis of organic molecules from CO2 in the air

11
Q

What stages of photosynthesis are the Light-Dependant reactions?

A

-The first 2 stages are light dependant reactions

12
Q

What stage utilizes Carbon-Fixation?

A
  • The 3rd stage bc it is the formation of organic molecules into CO2
  • Carbon-fixation is cyclic so it can occur with or without light which makes it a light-independant reaction
13
Q

What is the equation for photosynthesis?

A

CO2+H20+light—> C6H12O6+6H2O+602

14
Q

How is CO2 reduced?

A

-Its reduced to glucose using electrons gained from the oxidation of water= requires energy that is provided by light

15
Q

What is the Thylakoid membrane?

A
  • Its a continuous phospholipid bilayer organized into flattened sacs that are stacked on top of eachother to form columns= grana
  • It also contains chlorophyll, other pigments to capture light (photosystems), & the machinery to make ATP
16
Q

What is the Stroma Lamella?

A

-It is the connection between grana

17
Q

What is the stroma?

A
  • It surrounds the thylakoid membrane
  • It houses enzymes needed to assemble organic molecules from CO2 using energy from ATP coupled w/ the reduction via NADPH
18
Q

What are Photosystems?

A
  • They are result of the formtion of photosynthetic pigments clustered together in the thylakoid membrane w/ a specific organization
  • They act like a large antenna that gathers light energy harvested by many individual molecules
19
Q

How do Photosystems work?

A
  • So each pigment within the photosystem is able to capture photons
  • And when a properwavelenngth strikes the pigment, it causes and excited electron’s energy to pass through from molecule to another
  • When the energy arrives to a specific chlorophyll molecule in contact w/ a membrane bound protein, the energy passes on to a series of other membrane proteins that put the energy to work making ATP & NADPH