Photosynthesis Test
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- What are the two sources of Hydrogen ions that build up inside the thylakoid?
- 1- Splitting of water 2- Pumping of H+ ions
- Where does the atom of oxygen that was produced from water splitting go?
- joins with another Oxygen atom and diffuses out
- What does the accumulation of Hydrogen ions building up inside the thylakoid create?
- concentration gradient
- Why can't the Hydrogen ions just diffuse through the thylakoid membrane?
- the membrane is impermeable to ions
- What wavelength is optimum for PSI?
- 700
- What wavelength is optimum for PSII?
- 680
- how does light travel?
- in waves and in packets
- What are the distinct packets of energy of light called?
- photons
- Where do electrons from PSII end up at the end of light reactions?
- in PSI
- Where do the electrons form PSI end up at the end of light reactions?
- In NADPH
- How doe PSII replenish its electrons?
- splits water in hydrolysis
- What is the process of splitting water called?
- hydrolysis
- As the electrons from PSI travel down the electron chain to PSI, what is some of their energy used for?
- pump H+ ions from the stroma to the thylakoid compartment
- What is visible light a part of?
- electromagnetic spectrum
- What type of light has more energy- RED OR YELLOW?
- yellow
- What type of light has more energy- BLUE OR RED?
- blue
- What are the openings of a leaf called?
- stomata
- What type of cells surround these openings?
- guard cells
- Where are chloroplasts located in a leaf?
- in the mesophyll (spongy and palisade)
- What is he only molecule in a photo system that can pass electrons to the primary electron acceptor?
- reaction center CH LA
- Where to light reactions occur in a leaf?
- on the thylakoid membrane
- Where does the calvin cycle occur?
- in the stroma
- What wavelengths are good for photosynthesis?
- blue, red, violet
- What wavelengths are bad for photosynthesis?
- greens, yellows
- Why do plants have more than one pigment?
- to capture more energy
- What 3 things can happen to a photon of light as it encounters a chloroplast?
- reflected, absorbed, transmitted
- What pigment molecule is the primary molecule involved in photosynthesis?
- chlorophyll a
- What specific atom is in it's ring-like head?
- Magnesium
- What is a photosystem?
- a collection of pigment molecules in the thylakoid membrane arranged to capture light energy.
- What does ATP provide the Calvin Cycle with?
- Energy
- What does NADPH provide the Calvin Cycle with?
- high energy electrons
- As the hydrogen ions from the thylakoid flow through this molecule, what happens?
- the force causes the knob portion to turn and push a third phosphate onto ADP to make ATP (ADP + P --> ATP)
- What are the three products of light reactions?
- ATP, NADPH, oxygen
- What molecule allows the passage of Hydrogen ions from the thylakoid space into the stroma?
- ATP synthase