1. Light Reactions Part 3: Interactive Lyrics
[qwiz]
[h]Light Reactions Part 3: Interactive Lyrics
[i]What follows are the lyrics to Part 3 of the Light Reactions Song, in fill-in-the-blanks format. Reading the lyrics in this way will increase your ability to remember the concepts covered in the song.
Enjoy!
[q labels = “top”]
Now back to our electrons, moved by the sun
Flowing from Photosystem II to ______________,
They get to PS I like a used-up battery
The transport ______ used up their energy.
But when light hits PS I’s antenna
Electrons bounce to _________ center
This one’s P700
That wavelength makes _________ go.
[l]chain
[fx] No, that’s not correct. Please try again.
[f*] Good!
[l]electrons
[fx] No. Please try again.
[f*] Good!
[l]photosystem I
[fx] No. Please try again.
[f*] Excellent!
[l]reaction
[fx] No. Please try again.
[f*] Excellent!
[q labels = “top”]
PS 1’s electron ________ grabs them away
Leaving P700 in an oxidized way
And P700 with its oxidized blues
Accepts the ________ from PS 2.
Back to electron from ____
It now goes for a ride having its own fun,
But powering proton pumps ain’t its fate
It travels to NADP+ _________.
An enzyme chloroplasts count upon
To pass some __ and electrons
To NADP+ which gets reduced
It’s how _______ gets produced.
[l]acceptor
[fx] No, that’s not correct. Please try again.
[f*] Excellent!
[l]electron
[fx] No. Please try again.
[f*] Good!
[l]H
[fx] No. Please try again.
[f*] Correct!
[l]NADPH
[fx] No, that’s not correct. Please try again.
[f*] Good!
[l]PS1
[fx] No. Please try again.
[f*] Excellent!
[l]reductase
[fx] No. Please try again.
[f*] Correct!
[q labels = “top”]
Light reactions
happening in _______
Making ________
NADPH and ATP.
Through a ______-charged
current of electricity
Converted into ________ energy
[l]chemical
[fx] No, that’s not correct. Please try again.
[f*] Great!
[l]leaves
[fx] No. Please try again.
[f*] Correct!
[l]oxygen
[fx] No. Please try again.
[f*] Great!
[l]solar
[fx] No. Please try again.
[f*] Excellent!
[q labels = “top”]
___ is the by-product of the light reactions,
Oxygen production, here’s how it happens
Remember back in PS 2 it came to arise
Reaction center P680 got _________?
To replace lost electrons P680 liberates
Electrons from water which ___________
Into one oxygen and _______ two
The single O will meet another forming O2.
These protons are formed in the __________ space,
Increasing proton concentration in that place.
So we see a side effect of water’s oxidation
Is enhancement of ____ creation!
[l]ATP
[fx] No, that’s not correct. Please try again.
[f*] Excellent!
[l]dissociates
[fx] No. Please try again.
[f*] Correct!
[l]oxidized
[fx] No, that’s not correct. Please try again.
[f*] Great!
[l]O2
[fx] No, that’s not correct. Please try again.
[f*] Excellent!
[l]protons
[fx] No, that’s not correct. Please try again.
[f*] Good!
[l]thylakoid
[fx] No, that’s not correct. Please try again.
[f*] Correct!
[q labels = “top”]
Non-cyclic flow is also called the _________
Put “Z” on its side and see what I mean,
Electrons rise in _______, then fall then rise again
Making ATP and NADPH my friends.
A variation on this is ______ flow
Which makes ATP, no NADPH or O
Cyclic flow results from the _______ Cycle’s needs
It uses less NADPH than ATP.
[l]Calvin
[fx] No, that’s not correct. Please try again.
[f*] Good!
[l]cyclic
[fx] No. Please try again.
[f*] Great!
[l]energy
[fx] No, that’s not correct. Please try again.
[f*] Good!
[l]Z-scheme
[fx] No. Please try again.
[f*] Correct!
[q labels = “top”]
NADPH buildup has the repercussion
Of inhibiting NADP+ _________
‘Cause NADPH clogs up _________
Keeping NADP+ from moving into place.
So electrons don’t go to _______
They’re clogged, stuck like a pimple’s pus,
Where can they go from ______?
Nature evolved them a place to flow.
A shunt pathway moves them to the ____,
I’m talking ‘bout the one in PS 2, you see
These energized electrons flow and release _______
Which as you know is used to synthesize ATP!
[l]energy
[fx] No, that’s not correct. Please try again.
[f*] Excellent!
[l]ETC
[fx] No, that’s not correct. Please try again.
[f*] Good!
[l]NADP+
[fx] No. Please try again.
[f*] Excellent!
[l]P700
[fx] No. Please try again.
[f*] Great!
[l]reductase
[fx] No. Please try again.
[f*] Good!
[l]reduction
[fx] No, that’s not correct. Please try again.
[f*] Good!
[/qwiz]
2. Light Reactions Part 3, Flashcard Set 1
[qdeck random = “true”]
[h]Light Reactions Part 3, Flashcard Set 1
[i]Here’s how these flashcards work.
- Click ‘Check Answer’ to see the answer to each card.
- If you know it, click ‘Got it.”
- If you don’t know it as well as you’d like, click ‘Need more practice,’ and that card will go to the bottom of the deck so you can practice it again.
- ‘Shuffle’ lets you shuffle the deck.
[!]1a[/!]
[q]When ________ arrive at Photosystem 1, they have less energy than when they left Photosystem 2.
[textentry]
[a]When electrons arrive at Photosystem 1, they have less energy than when they left Photosystem 2.
[!]2a[/!]
[q]Electrons flow from Photosystem 2 to Photosystem 1 along the ______________________.
[textentry]
[a]Electrons flow from Photosystem 2 to Photosystem 1 along the electron transport chain.
[!]3a[/!]
[q]When _______ leave p700, that reaction center becomes oxidized.
[textentry]
[a]When electrons leave p700, that reaction center becomes oxidized.
[!]4a[/!]
[q]To replace its lost electrons, p700 accepts incoming electrons from Photosystem ___
[textentry]
[a]To replace its lost electrons, p700 accepts incoming electrons from Photosystem Two
[!]5a[/!]
[q]Electrons from Photosystem One flow to the electron acceptor ______.
[textentry]
[a]Electrons from Photosystem One flow to the electron acceptor NADP+.
[!]6a[/!]
[q]Whereas electron energy in Photosystem Two is used to pump _____, electron energy in Photosystem One is used to reduce NADP+.
[textentry]
[a]Whereas electron energy in Photosystem Two is used to pump protons, electron energy in Photosystem One is used to reduce NADP+.
[!]7a[/!]
[q]Whereas Photosystem Two powers creation of a proton gradient, Photosystem One’s energy is used to create ______.
[textentry]
[a]Whereas Photosystem Two powers creation of a proton gradient, Photosystem One’s energy is used to create NADPH.
[!]8a[/!]
[q]The products of the light reactions are ATP and NADPH. The by-product is ______.
[textentry]
[a]The products of the light reactions are ATP and NADPH. The by-product is oxygen.
[!]9a[/!]
[q]In Photosystem Two, reaction center p680 gets _______.
[textentry]
[a]In Photosystem Two, reaction center p680 gets oxidized.
[!]10a[/!]
[q]To replace lost electrons, p680 grabs electrons from water, which _________.
[textentry]
[a]To replace lost electrons, p680 grabs electrons from water, which dissociates.
[!]11a[/!]
[q]Dissociation of water by p680 creates two protons and an ______ atom (which element?).
[textentry]
[a]Dissociation of water by p680 creates two protons and an oxygen atom.
[!]12a[/!]
[q]Protons generated by dissociation of water by Photosystem Two accumulate in the ____________.
[textentry]
[a]Protons generated by dissociation of water by Photosystem Two accumulate in the thylakoid space.
[!]13a[/!]
[q]Protons that build up in the thylakoid space get there through proton pumping by Photosystem ___, and also by breakdown of water molecules by that same photosystem.
[textentry]
[a]Protons that build up in the thylakoid space get there through proton pumping by Photosystem Two, and also by breakdown of water molecules by that same photosystem.
[!]14a[/!]
[q]A side effect of water’s oxidation is enhancement of ___ creation by increasing the gradient for chemiosmosis.
[textentry]
[a]A side effect of water’s oxidation is enhancement of ATP creation by increasing the gradient for chemiosmosis.
[!]15a[/!]
[q]Non-cyclic flow electron flow is also called the ________
[textentry]
[a]Non-cyclic flow electron flow is also called the Z-scheme
[!]16a[/!]
[q]Non-cyclic electron flow generates ATP and _______, with oxygen generated as a by-product.
[textentry]
[a]Non-cyclic electron flow generates ATP and NADPH, with oxygen generated as a by-product.
[!]17a[/!]
[q]Cyclic electron flow generates only ___
[textentry]
[a]Cyclic electron flow generates only ATP
[!]18a[/!]
[q]Cyclic electron flow results from the fact that the Calvin Cycle uses less ______ than ATP.
[textentry]
[a]Cyclic electron flow results from the fact that the Calvin Cycle uses less NADPH than ATP.
[!]19a[/!]
[q]Buildup of NADPH during the ___________ inhibits reduction of NADP+.
[textentry]
[a]Buildup of NADPH during the light reactions inhibits reduction of NADP+.
[!]20a[/!]
[q]Buildup of NADPH blocks enzyme ______ sites in the enzyme NADP+ reductase
[textentry]
[a]Buildup of NADPH blocks enzyme binding sites in the enzyme NADP+ reductase
[!]21a[/!]
[q]When NADP+ reductase is blocked, electrons flow to a _____ ______ that returns them to the electron transport chain of Photosystem Two.
[textentry]
[a]When NADP+ reductase is blocked, electrons flow to a shunt pathway that returns them to the electron transport chain of Photosystem Two.
[!]22a[/!]
[q]In ______ electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[textentry]
[a]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[!]23a[/!]
[q]In cyclic electron flow, the sole use of electron energy is used to pump protons from the _____ to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[textentry]
[a]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[!]24a[/!]
[q]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ____.
[textentry]
[a]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[/qdeck]
3. Light Reactions Part 3, Flashcard Set 2
[qdeck random = “true”]
[h]Light Reactions Part 3, Flashcard Set 2
[i]start
[!]1b[/!]
[q]When electrons arrive at Photosystem 1, they have ____ energy than when they left Photosystem 2.
[textentry]
[a]When electrons arrive at Photosystem 1, they have less energy than when they left Photosystem 2.
[!]2b[/!]
[q]The ______ center in Photosystem One is p700.
[textentry
[a]The reaction center in Photosystem One is p700.
[!]3b[/!]
[q]When electrons leave p700, that reaction center becomes ______.
[textentry]
[a]When electrons leave p700, that reaction center becomes oxidized.
[!]4b[/!]
[q]Electrons from Photosystem ____ flow to the electron acceptor NADP+.
[textentry]
[a]Electrons from Photosystem One flow to the electron acceptor NADP+.
[!]5b[/!]
[q]The enzyme that ______ NADP+ is NADP+ reductase.
[textentry]
[a]The enzyme that reduces NADP+ is NADP+ reductase.
[!]6b[/!]
[q]Whereas electron energy in Photosystem Two is used to pump protons, electron energy in Photosystem One is used to reduce _____.
[textentry]
[a]Whereas electron energy in Photosystem Two is used to pump protons, electron energy in Photosystem One is used to reduce NADP+.
[!]7b[/!]
[q]The products of the light reactions are ___ and NADPH. The by-product is oxygen.
[textentry]
[a]The products of the light reactions are ATP and NADPH. The by-product is oxygen
[!]8b[/!]
[q]In Photosystem ___, reaction center p680 gets oxidized.
[textentry]
[a]In Photosystem Two, reaction center p680 gets oxidized.
[!]9b[/!]
[q]To replace lost electrons, _____ grabs electrons from water, which dissociates.
[textentry]
[a]To replace lost electrons, p680 grabs electrons from water, which dissociates.
[!]10b[/!]
[q]Dissociation of water by ____ creates two protons and an oxygen atom.
[textentry]
[a]Dissociation of water by p680 creates two protons and an oxygen atom.
[!]11b[/!]
[q]______ generated by dissociation of water by Photosystem Two accumulate in the thylakoid space.
[textentry]
[a]Protons generated by dissociation of water by Photosystem Two accumulate in the thylakoid space.
[!]12b[/!]
[q]______ that build up in the thylakoid space get there through proton pumping by Photosystem Two, and also by breakdown of water molecules by that same photosystem.
[textentry]
[a]Protons that build up in the thylakoid space get there through proton pumping by Photosystem Two, and also by breakdown of water molecules by that same photosystem.
[!]13b[/!]
[q]Protons that build up in the thylakoid space get there through proton pumping by Photosystem Two, and also by breakdown of _____ molecules by that same photosystem.
[textentry]
[a]Protons that build up in the thylakoid space get there through proton pumping by Photosystem Two, and also by breakdown of water molecules by that same photosystem.
[!]14b[/!]
[q]A side effect of water’s oxidation is enhancement of ATP creation by increasing the gradient for ___________.
[textentry]
[a]A side effect of water’s oxidation is enhancement of ATP creation by increasing the gradient for chemiosmosis.
[!]15b[/!]
[q]________ electron flow generates ATP and NADPH, with oxygen generated as a by-product.
[textentry]
[a]Non-cyclic electron flow generates ATP and NADPH, with oxygen generated as a by-product.
[!]16b[/!]
[q]Non-cyclic electron flow generates ATP and NADPH, with ______ generated as a by-product.
[textentry]
[a]Non-cyclic electron flow generates ATP and NADPH, with oxygen generated as a by-product.
[!]17b[/!]
[q]____ electron flow results from the fact that the Calvin Cycle uses less NADPH than ATP.
[textentry]
[a]Cyclic electron flow results from the fact that the Calvin Cycle uses less NADPH than ATP.
[!]18b[/!]
[q]Cyclic electron flow results from the fact that the Calvin Cycle uses less NADPH than ___.
[textentry]
[a]Cyclic electron flow results from the fact that the Calvin Cycle uses less NADPH than ATP.
[!]19b[/!]
[q]Buildup of NADPH during the light reactions inhibits _______ of NADP+.
[textentry]
[a]Buildup of NADPH during the light reactions inhibits reduction of NADP+.
[!]20b[/!]
[q]Buildup of NADPH blocks enzyme binding sites in the enzyme NADP+ ________
[textentry]
[a]Buildup of NADPH blocks enzyme binding sites in the enzyme NADP+ reductase
[!]21b[/!]
[q]When NADP+ reductase is blocked, electrons flow to a shunt pathway that returns them to the ___________________ of Photosystem Two.
[textentry]
[a]When NADP+ reductase is blocked, electrons flow to a shunt pathway that returns them to the electron transport chain of Photosystem Two.
[!]22b[/!]
[q]In cyclic electron flow, the sole use of ______ energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[textentry]
[a]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[!]23b[/!]
[q]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the _______ space, which generates a gradient that is used to power synthesis of ATP.
[textentry]
[a]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[/qdeck]
4. Light Reactions Part 3, Flashcard Set 3
[qdeck random = “true”]
[h]Light Reactions Part 3, Flashcard Set 3
[i]start
[!]1c[/!]
[q]_________ flow from Photosystem 2 to Photosystem 1 along the electron transport chain.
[textentry]
[a]Electrons flow from Photosystem 2 to Photosystem 1 along the electron transport chain.
[!]2c[/!]
[q]The reaction center in Photosystem One is ____.
[textentry]
[a]The reaction center in Photosystem One is p700.
[!]3c[/!]
[q]To replace its lost _______, p700 accepts incoming electrons from Photosystem Two
[textentry]
[a]To replace its lost electrons, p700 accepts incoming electrons from Photosystem Two
[!]4c[/!]
[q]Electrons from Photosystem One flow to the electron _______ NADP+.
[textentry]
[a]Electrons from Photosystem One flow to the electron acceptor NADP+.
[!]5c[/!]
[q]The enzyme that reduces NADP+ is NADP+ ________.
[textentry]
[a]The enzyme that reduces NADP+ is NADP+ reductase.
[!]6c[/!]
[q]Whereas Photosystem Two powers creation of a ______ gradient, Photosystem One’s energy is used to create NADPH.
[textentry]
[a]Whereas Photosystem Two powers creation of a proton gradient, Photosystem One’s energy is used to create NADPH.
[!]7c[/!]
[q]The products of the light reactions are ATP and ______. The by-product is oxygen
[textentry]
[a]The products of the light reactions are ATP and NADPH. The by-product is oxygen
[!]8c[/!]
[q]In Photosystem Two, reaction center ____ gets oxidized.
[textentry]
[a]In Photosystem Two, reaction center p680 gets oxidized.
[!]9c[/!]
[q]To replace lost electrons, p680 grabs electrons from ____, which dissociates.
[textentry]
[a]To replace lost electrons, p680 grabs electrons from water, which dissociates.
[!]10c[/!]
[q]Dissociation of water by p680 creates two ______ and an oxygen atom.
[textentry]
[a]Dissociation of water by p680 creates two protons and an oxygen atom.
[!]11c[/!]
[q]Protons generated by dissociation of _____ by Photosystem Two accumulate in the thylakoid space.
[textentry]
[a]Protons generated by dissociation of water by Photosystem Two accumulate in the thylakoid space.
[!]12c[/!]
[q]Protons that build up in the thylakoid space get there through _________ by Photosystem Two, and also by breakdown of water molecules by that same photosystem.
[textentry]
[a]Protons that build up in the thylakoid space get there through proton pumping by Photosystem Two, and also by breakdown of water molecules by that same photosystem.
[!]13c[/!]
[q]A side effect of water’s ________ is enhancement of ATP creation by increasing the gradient for chemiosmosis.
[textentry]
[a]A side effect of water’s oxidation is enhancement of ATP creation by increasing the gradient for chemiosmosis.
[!]14c[/!]
[q]_________ flow electron flow is also called the Z-scheme
[textentry]
[a]Non-cyclic flow electron flow is also called the Z-scheme
[!]15c[/!]
[q]Non-cyclic electron flow generates ___and NADPH, with oxygen generated as a by-product.
[textentry]
[a]Non-cyclic electron flow generates ATP and NADPH, with oxygen generated as a by-product.
[!]16c[/!]
[q]______ electron flow generates only ATP
[textentry]
[a]Cyclic electron flow generates only ATP
[!]17c[/!]
[q]Cyclic electron flow results from the fact that the __________ uses less NADPH than ATP.
[textentry]
[a]Cyclic electron flow results from the fact that the Calvin Cycle uses less NADPH than ATP.
[!]18c[/!]
[q]Buildup of _______ during the light reactions inhibits reduction of NADP+.
[textentry]
[a]Buildup of NADPH during the light reactions inhibits reduction of NADP+.
[!]19c[/!]
[q]Buildup of ______ blocks enzyme binding sites in the enzyme NADP+ reductase
[textentry]
[a]Buildup of NADPH blocks enzyme binding sites in the enzyme NADP+ reductase
[!]20c[/!]
[q]When NADP+ _________ is blocked, electrons flow to a shunt pathway that returns them to the electron transport chain of Photosystem Two.
[textentry]
[a]When NADP+ reductase is blocked, electrons flow to a shunt pathway that returns them to the electron transport chain of Photosystem Two.
[!]21c[/!]
[q]When NADP+ reductase is blocked, electrons flow to a shunt pathway that returns them to the electron transport chain of Photosystem ___.
[textentry]
[a]When NADP+ reductase is blocked, electrons flow to a shunt pathway that returns them to the electron transport chain of Photosystem Two.
[!]22c[/!]
[q]In cyclic electron flow, the sole use of electron energy is used to pump ______ from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[textentry]
[a]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[!]23c[/!]
[q]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a ______ that is used to power synthesis of ATP.
[textentry]
[a]In cyclic electron flow, the sole use of electron energy is used to pump protons from the stroma to the thylakoid space, which generates a gradient that is used to power synthesis of ATP.
[/qdeck]
What’s next?
- Calvin Cycle (under development)
- Photosynthesis Main Menu